Bad customer experience

I am so disappointed with vodacom I have a contract for more than 10 Years. Second number has been opened for at least a year where I receive 10GB of data and for some reason in December all of a sudden my data is used up. I called the service consultant I asked her to to log a request doe a technician to advise compared to all the what have I done differently bcaz according to me nothing has changed but for the 1st time in a long time my data has been used up. Consultant didn’t want to log a service request instead she wanted to get me statements that will cost me more money that get me to understand the data consumption that I called about. I will make jeans to Settle contract and move vodacom does not deserve my loyalty