Incorrect data package 3 months in a row.

I signed a Vodacom contract with 250MB + 200MB of data and 1GB for the first x3 mounts. The first few months all was well with this deal, but for x3 months now I only get the 250MB and a SMS telling me that I'm about to run out of data, \to buy and save dial 111..."<br> <br> I have repeatedly phoned the provider to correct my data"