Apple is a **** brand

My brother bought me an iphone 6 less than 6 months ago. I gave the phone to my son to use since I had another phone and he needed a phone (something I dont regret as I now HATE the product more than I did before.). Suddenly last week, the phone stopped working and I took it to eastgate. now I get an email saying because it has a dent , the dent makes the warranty void - what ****** nonsense is that? the dent has nothing to do with the phone not working, the dent happened a week after we got the phone and it worked perfectly fine since then until now. I WILL NEVER EVER BUY ANYTHING THAT HAS TO DO WITH APPLE - its **** brand