VODACOM CONSULTANTS A BUNCH OF *****!!!!

I am one of the best customers so Vodacom phones me with one of their best offers....they sell me 2 gigs of data with a 3 in one sim telling me that I will never have to do a sim swop again. They also tell me that I can cancel my current 1 gig data contract immediately at *** and I WILL KEEP MY CURRENT NUMBER!! There are also other large discounts I get from learning institutions....what a big ***** up!!! What is get is another sim....MY OLD ONE IS STILL ACTIVE AND WORKING...with another number on which the 2 gigs data is loaded. (WHAT SHOULD I DO WITH ONE PHONE AND 2 SIMS WITH 2 NUMBERS? THEY PROMISED ME I WILL KEEP MY NUMBER) When I complain about this, telling them they **** to me, and that they should CANCEL the contract, they tell me that the voucher will be collected from me and as soon as that is done, they will cancel the deal.....2 HOURS LATER I get about ten messages from them telling me that this new sim has been changed to prepaid on my request. SO THEY WILL STILL CHARGE ME FOR THE 2 GIGS DATA!! now I do not trust them anymore to do what they are saying they will do because up to now, THEY DID NOT DO WHAT THEY SAID THEY WOULD. The minute I received these messages, I start to phone them on the change contract line...*** the number they gave me. When you phone you have to type the number you query and the minute I put this new number in, it tells me that it is a prepaid number and that this number I dialed cannot help me with anything. The call is then cutt off straight away. Then I tried phoning 082135 which is customer care where I have to put once again the number I query. The minute I add this number, the line goes over to prepaid and once again I am being treated as a prepaid customer and prepaid customer can only do a few things. NONE OF THEM INCLUDE CANCELLING A DEAL THEY SOLD ME. They are effectively blocking me from speaking to ANY CONSULTANT!! When I go to their shop in Richards Bay, they tell me they cannot handle my query as it has been done on the phone and that I have to phone customer care. WHAT DO I DO? THIS IS A VICIOUS CIRCLE AND I AM AT THE SHORT END!!! how do I know that they will actually just charge me once for this 2 gig data? HOW DO I TRUST THEM AFTER THIS?