Credit Card - Woolworths

Poor Service received from Woollies; I need my matter sorted as a matter of urgency as it affects my credit profile ,i have been paying off their credit card since 2022 they gave me references that i needed to use when paying them off ,when wen instore to enquire as to how far i was with the payments ,i am been told my account has been sold to lawyers and that there nothing they can do for me i need to pay the lawyers in order for them to clear my name, I tried giving them the proof of payment but fell into death ears ,so their expectations is that i must pay off and account that i have already been paying since 2022 ,i need someone to please help me as this is giving me sleepless night