Guy fixed my iPhone now it's broke even more

I bought an iPhone 4 off eBay like 4 months ago, everything was FINE, everything was WORKING properly. I ended up dropping my phone several times, and everybody knows what happens with you drop your phone without a good protective case, it shatters. Well, I FINALLY got my screen replaced today, I got it back… The guy said when he took it apart, some screws weren't even screwed in. Once I got home, my home button is stuck, my camera won't work, I only get Wi-Fi in one room of the house, and it only charges on the computer.
I contacted him and he said to bring it back tomorrow and he will look at it.
What happened?!

Added (1). Did he do something or what happened?
Do you think this can be fixed?

My iPhone screen went black? - 1

U dropped my phone and the screen is black. When i put in on the charger, i feel the vibration of the phone, but the screen is still black.

Why isn't iCloud working on iPhone?

I have bought a iPhone 5S 32 gb from eBay. It came with iOS 7.1 and I did a Clean restore to iOS 8.1. Wiped the entire device. I set up my apple account, everything seemed to work fine. This is my first apple device other than the iPod. So I never made a iCloud account. When I try to sign up to iCloud it says that I'm not eligible and account limit reached how can I fix it. I really need to make an iCloud.

I'm running windows 8.1 on my laptop. With iTunes 64 bit. I tried everything nothing works. I downloaded iCloud on my pc too. But it says "this apple id is valid but not an iCloud account".

How to see old texts without scrolling all the way up?

So the texts are on an iPhone 4s, I want to look back at some conversations that were about in may or June. But I've sentered and received So many messages from that person since then, and it would take forever to scroll up that far. My phone would probably crash before I get there. Is there anyway I can view the conversations from may or June if I haven't deleted them yet?

Why won't iPhone 5c connect to internet?

My grandma's iPhone 5c isn't working. It has service bars, but it won't load anything. We tried connecting her phone to our Wi-Fi (which is working on everything else) and still no luck. It just won't connect. Does anyone know what's wrong with it?

ATT data plan and Wi-Fi usage?

I got a iPhone and am probably going to get a 50mb data plan. I'm doubting if it will be enough for one month but I will also be using my Wi-Fi from home. My question is, is there a certain way I should configure my iphone so it will only use Wi-Fi and not any of my data from the plan while I'm at home? Or will it do this automatically?

Grandma throwing an anger tantrum

This is my first time posting here, but I'll keep it short. Sometimes I like to fix phones or laptops as a favor for people and I usually don't charge them, but they give me money anyways because they think I'm a kid and all.

My grandma told her friend about me and he decided to give me an iPhone 4S to unlock. I didn't think anything of it until I noticed it was stolen and the original owner locked it and had a number to reach him. I wanted to contact the original owner and do the right thing, but I didn't think it was my place, so I told my grandpa to call the guy up and tell him I don't work with stolen things and to come pick it up.

Fast forward a month later and the guy never came to pick it up. I left the phone in a cabinet on our computer desk and told my grandparents to give it to him before I went to school in the morning. It's been there ever since and I just noticed it was gone earlier today while I was searching for something. My grandma is now threatening to kick me out of the house unless I find the phone and she's throwing a huge tantrum over the whole thing. She cares more about what people think about her than her own grandson it seems.

Any advice as to how to approach the situation?

Can you block an entire area code on an iPhone?

I have a 405 area code (Oklahoma), but am constantly getting calls from 402 (Nebraska)-- I assume this is an error when people are typing in the number, as 2 is directly above 5 on a 3x3 number layout. Nonetheless I get 1-2 calls EVERY DAY from Nebraskans who can't double check their numbers before they call.

(Like, for two months this guy hounded me saying I owed him $500 despite me saying that he had the wrong number and to try with a 402 area code.)

I have an iPhone 4 with iOS 6.