Incompetency in the best regard

Thanks to Vodacom's incompetency after numerous calls, and their admittance that they were in the wrong, my credit rating is being affected, and as per the collections I have been told that I will be blacklisted. Even though this situation is of no fault of my own, and there are no contact details except for e-mail addresses, and when you do get a contact number it takes a month to get to the correct person. Do not use Vodacom, it is exactly a year later and this issue has still not been resolved.