My iPhone sucks and my warranty is gone?

My iPhone has a problem of taking a long time to charge and dying really fast. Some nights when left on the charger it doesn't even reach 100% and will die within 2 hours of minimal use. Also it gets very very hot when charging. After multiple trips to the phone repair store trying new batteries and charging ports it was determined that it was damage to something in the computer aspect due to faulty chargers and/or electrical power from my home. They said that this can be dangerous because it could potentially catch on fire. I've only had the phone for like 6 months so I still have warranty through apple but since my phone has been opened and parts have been changed I was told my warranty is voided.
I have service through AT&T and have insurance but is my insurance for damaged device voided because of the repairs? Should I stop using my phone for a few days and call in a lost/stolen phone? I really can't afford to buy a new one offline and I have no upgrades.

Why didn't you take it to an apple store to begin with? Thats what you should have done and then you wouldn't have any issues.

  • Why S-Voice sucks compare to SIRI on iPhone? I got galaxy s3 and the s voice sucks on it. I'm wondering if it sucks on the iphone 4s (siri)? How acuarate is it? Sorry for my mistakes and grammar. I suck.
  • Who thinks ios 7 on the iphone 4 sucks? Well, ios 7 on the iPhone 4 sucks because you don't get all the cool features, you don't get the cool display with your icons moving, it's slow, you can't take panorama photos, you don't get the new dynamic wallpapers. When my iPhone 4 was on ios 6, it was actually good and enjoyable, but do you think ios 7 sucks on the iPhone 4?
  • New iPhone layout iOS 7 sucks. How can I change it? The letter were bold in the previous versions and everything looked nicer. The new crap looks horrible. Is there an app to change it back to the same look or is this time for me to move on to another phone finally? Tyler, your mothers legs do. I was expecting responses from fanboy geeks lol. Losers find a girl.
  • My music on my iPhone 4 SUCKS? My phone has been acting weird lately and i don't know why i would click on a song and all of a sudden it dosent even play the song it just starts going to the next then the next and it goes through all my songs i don't get why i restarted it before and after i updated my phone. I took my music off and put it back into my phone please help if you want to know more let me know please help i need music