Incorrect billing

I app**** for a contract with vodacom on the 3rd of December and my contract was activated today. Smart xs +... The consultant advised that I will get 50 min and 350mb for R745 pm. I registered for my vodacom app and noticed that I am being charged for 10gb of data. I phoned the call center and they asked me to go back to the store. My bill is over R1000! I only have the contract for 1 day! This is the 3rd time I will be going to to the store. I went on the 2nd of December to do transfer of ownership and was asked to come back the next day after waiting for over 40 min. Came back the next day. Took them 2 hours to do the transfer and contract. Went back again.... Today the guy did not give me a new Sim card.another 40 min. This is unacceptable. Please deactivate the 10gb. I can't afford this