Bad service

I recently had my credit report sent to me from Transunion only to find that Vodacom is listed on my profile with an arrears amount of R4236 I contacted Vodacom immediately and was told by the call centre agent that I have to make payment or my credit score would be affected This account is a prescribed account as I was not contacted in the past few years with regard to payment When I did a credit report in 2016 Vodacom was not listed and now they expect me to pay Surely amnesty applies to this ????