Ruined my whole credit score

My credit score is *****ed because Vodacom marks the payments I have PAID as UNAPID. I have tried for weeks to get contact, the service is the worst I’ve ever experienced. They have messed up my credit score which is appalling. I may as well not pay if they are marking it as unpaid regardless, that’s clearly what they want. :) sort your **** out!!!! You have NO RIGHT RUINING PEOPLES CREDIT SCORE WHO PAY YOU!!!!!