In correct contract

On 8th Dec i upgraded my contract at VODACOM CRESTA to a 2 gig TOP UP.In begining of Feb i was informed that the data was high which was confusing as my contract was a TOP UP.I appraoached VODACOM CRESTA to get a copy of the contract and it clearly showed i signed a TOP UP CONTRACT and the consultant loaded it as a normal open line contract.Then the fun began with the consultant Thabiso phoning vodacom data call centre and logging a call where he **** to them indicating he was putting in a call quering the high use of data even though i told him im not disputing the data usage but the in correct contract he loaded.At this stage i started recording what was going on as i knew i was going to need it.A few weeks later i recieved a call from the Manager Ricardo who assured me this would be sorted out and understood my problem.To date i have recieved a half credit for end Feb and nothing for March for a mistake that VODACOM has made.The consultant then called me to say that i would recieve half the amount back which i am still very un happy about as i signed for a top up contract.I am still waiting for March to be credited.Please Vodacom HELP ME i have always supported YOU.