Vodacom incorrectly listed me and is not assisting

I am currently in the process of purchasing a property and just discovered that Vodacom T/A Nairtime has listed me not once but four times for arrear payments. This has taken my credit score down by 29 points, affected my family and I's prospects of purchasing our home and Vodacom takes no accountability for this incorrect listing for which there is no justification. I almost had a mental breakdown as a result. I have no pending loans, outstanding loans nor have I had in the last few months. I only have a contract which has been paid monthly. I just want this matter resolved and to terminate all contracts I have with Vodacom. I have no intention of doing business with people who have no disregard for human beings.