Passing the Buck

My name is Lindiwe I had made an arrangmement to pay my account in full which I did on the 20th August straight to Truworths.I have recently discovered that my account has been handed over and now have a Default against my name at Trunsunion I have called Trueworths to ak for a paid up letter and to update my information they sending me to the company they handed me over too,when I call them they tell me I paid Truwoths direct and they must deal with the query I am tired and frustrated can someone please fix this as its messing my profile and I am phoning the whole day and getting no help and my profile is going doen because of this default update accordingly even in April I paid it was not updated so clearly I regret opening this account.