MERGED MY CONTRACT NUMBERS TO PREPAID WITHOUT MY CONSENT

Good day, i would like to express how unhappy i am and disappointed with the service i have received from MTN. On the 21st April 2016 i went to OR Tambo International Airport to the MTN store there specifically with one question in mind. i walked in the store and was assisted by an MTN representative called Mr Obakeng Kgomo, I informed Mr Kgomo that i have three contracts with MTN and that i want to pay for the remaining months but still keep my contracts active and still receive provisions for the three numbers as i DON'T want to loose my Data and Airtime. I asked if i could do this and the sales rep told me that it is definitely possible so i sat down with Mr Kgomo and he calculated how much i would need to pay. The total amounted to R 14,645.42 for the three contracts i took out my card and paid for the remaining months for my contracts, cool. What ****es me off is that on the 26/04/2016 after getting paid i receive a text message from FNB telling me that i have been debited R 1147 Ref.MTN Sp A***; i was not supposed to be debited so therefore i call MTN on that day or the day after telling them i want a refund as i have already paid. the assistant informed me that my call has been logged and i will have to wait four or more days, cool. On the 03/05/2016 i call the MTN Contract helpline 808 and the VOIP informs me that i cannot be helped as my number has been merged to prepaid, Im like "***", so i call the 173 prepaid customer line and ask them why my number is on prepaid as i have not requested such. the assistant informs me that he cannot check on his side as this might be a problem caused by the guys at the MTN Store at OR Tambo Int and advised that i should go there and esquire with them. When i went to the MTN Store at OR Tambo and asked them what happened the sales rep remembered who i was and i explained what had happened and he explicitly remembers that i just wanted to pay for the remaining months etc. So as he checked the system there was nowhere showing that i have requested for my numbers to be merged to contract and there was no contract i signed that stated that i want my numbers to be merged to contract. i mean why would i cancel my contracts if i still got provisions (Airtime and Data) that i still have to receive for the remaining months of the 3 contracts. So i am very disappointed with MTN as they have debited my account of R 1147.00 which was not supposed to and also merged my three contract numbers to prepaid which i have not requested. I need urgent assistance with this as you have f***ed up my budget for this month. Thanks Regards Mpho kubheka ***