listed on credit beurre of a cellphone contract cancelled due to factor faults delivered with

App**** for a contract with this company i had to return a cellphone within the specified time period as it was not functioning properly , i made several calls , wrote emails to them on the after a week i receive the message " please note your device has been booked for collection with courier IT for 25th august and your waybill number is *** it was collected from , i called the to ask if anything pending it ws NO i just check my credit record with VERICREDIT i found the listing of this contract can you remove this from my name because i dont owe you a cent i return your cellphone back.