I was deceived when i get the phone the voice ...

I was deceived when i get the phone the voice was not clear , so i used a headphone or made it on speaker, and i accepted this small problem since it was used phone ;after few months later, the screen gave me yellow lines and different colors; then the screen touch stopped working at all. I tied to fix it but the Apple store refused to fix the phone and they said that this is not their real iPhone. THE big issue is that i still try to get my refund.

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