VODACOM LISTING INCORRECT INFO TO BUREAU!!!!!!

My ITC scoring has been influcenced due to bad accout management from Vodacom. In 2017 I've mailed them asking why am I receiving invoices as my contract was cancelled , last statement and invoice in 2017. Only to realize now that they listing me as a bad payer of my account for R9.80 , this caused my rating to drop tremendously. ***!!! now you phone and don't get any joy from the poor call center services in place??????? I need a letter stating my account is closed. And Vodacom clearing the info they sending to the bureau stating incorrect information. this is totally unacceptable.