No response on urgent query - onyx client

My account was mixed up with someone else's details. So my number was suddenly blocked because someone else account was loaded to mine. I have been to two different vodacom shops where they could not help me. I then went to vodacom world in Midrand and they promised that the problem will be solved within 2 working days. It has now been 5 days and no one can help me with my query. When I phone no one has answeres. When looking on the system it is still someone else's details on my account. I am an onyx client and have just renewed my contract in October 2015. Had I known this was going to happen I would have rather cancelled the contract. This is highly dissapointing.