bad service and no response!

After posting my situation on the 16th June, I have received 1 response saying Mtn would look into the matter! Tomorrow is a week and still nothing! I still cannot load data onto my ipad after buying R160 airtime and I refuse to accept it at that! It is nonsense to pay for something and when trying to load the data get told you have insufficient funds! And then just get told by your staff that I used the airtime but they cannot tell me on what! I am extremely unhappy as R160 is a lot of money to just throw away and this has never happened before! Could someone please contact me urgently and tell me what happened here! The number for my ipad is ***!!!