Iphone 6 not turning on?

So i recently got my iphone 6 battery and screen replaced and it worked completely fine for 2 weeks yesterday i woke up and the screen wouldn't turn on and i plugged it in it was still black i noticed the camera part of the phone getting hot

Order shipped to wrong address.i need my sister to pick it up for me?

I purchased an iphone7 on ebay and i updated my shipping address because i moved 2.30 hours away, but then something went wrong and i assume when i went to fix it, the old shipping address went back on there without me noticing… Now my expensive parcel is headed to a place it could get stolen. However, my sister lives in my old city and was wondering if i filled out a letter of authorization, that she could go get it for me? I'm super stressed and annoyed as i just need a phone for work.

IPhone message app keeps crashing?

Whenever I try to send a new message, the message app freezes and crashes right after I type in a few letters of a contact name. How do I fix this? I've tried shutting my phone off and on and doing a hard reset already, but it still hasn't changed anything.

IPhone 7 plus scratched?

If you have a scratch on the iPhone 7 plus on the top right corner but it's a scratch you can see clearly even if you have a screen protector on but its not that of a big deal And it's not like a huge scratch it's a medium scratch and not so small would that bother you or you wouldn't care about it?

Which is better iphone 6s or 7, I like the headphone jack but don't get the headphone situation with 7, also is 32gb enough or do I need 64?

Which is better iphone 6s or 7, I like the headphone jack but don't get the headphone situation with 7, also is 32gb enough or do I need 64?

Added (1). I currently have the 4s and Really need to upgrade to a sim free iphone, I enjoy listening to music on my phone and I only have twitter, ig, facebook, message, whatsapp, livescore, moldiv as apps on my phone & can't see me wanting more on iphone 6s can you delete books and all the stupid apps no one ever opens too and does the 7 come with headphones and how do they work without the jack

Anyone else have a invincible iPhone 5c?

Iv dropped it on concreate so many times it's not even funny iv had it completely submerged in water and iv dropped it so many times there are scuffs and dents in the actual plastic but the screen and phone itself still work it's amazing