disputing the accounts

On 28 feb 2015 i saw sms on my debting my account amount of R 1700 and i know that i haven't apply for any <br> cellphone contract @ 8ta i went to 8ta store in vanderbijl park to inquirer about this matter and i was told to bring<br> the affidavit and recent id copy however the havent respond to my query and the had sent my name to attorneys for collections and its affecting my credit beruer