vodacom blacklisted me because of their own fault

I took out a bigger contract in January 2015. Vodacom never adviswd me that it will only start beginning of the next month. Needless to say I racked up a bill of almost R4000. I disputed it, and refused to pay the disputed amount. I only played the 1030 odd rands I was supposed to. After 2 months of emails, phonecalls and what not they admitted their mistake and refunded me. <br> <br> Now I am blacklisted because of the disputed amount, for which there was a service request open for 2 months. I'm not even complaining about the week they cut off my line, again while my service request was open.<br> This is damage that cannot be repaired, ever. Please see if you can at least get them to get me off of the ITC bad credit record. I am considering a civil suite.<br> <br> The phone Mr. In question is ***