iphone 6plus

when my 6+ showed the flickering bar on the top of the screen, I was told by Apple that it may be replaced for a sum of $150, fine! I said, now I can't even use the replacement, it keeps rebooting, taking screenshots, hanging up on calls, the whole screen flickers, impossible to use, went to apple and was told it may be replaced again for 150$,the tech said Apple knows about this and we will be happy to help,but he said he has to clear it with his manager!!!

came back and said we can replace it for $ 350, I said what???!! now I'm really mad!

I lost so much trying to reset the thing, now they want more money for a problem Apple knew about,why can't they just recall it without having customers SHEDDING more $$$$