ATT is charging me for a phone I returned in dec.2018. I assumed the case was closed by March so I threw away receipt. This is the 4th time this company has done this to me even turning my phone then 2days later the phone was found. There is a problem on mail returns and there warehouse and the fact they have no records of the ime number to the phone they are charging me for. This has caused a health issue . I do not want my credit score to go down but at this point I have to say I dont care.Why dont they track where phone is thru GPS???????