Not receiving what is advertised

I recently took a new contract with Telkom mobile at the Chatsworth centre branch on the 16th of January and was promised 10gigs of data per month for the first 3 months. I have not received that data as yet and when I made a call to customer service on the 19th, I was told that the data was pro rated. The agent then told me that 5gigs of data was loaded and it had been used already even though the data was off and it had been less than 3 days since the new line was activated. I then used the chat option on telkom.co.za and was told to wait until the 1st of the new month for the data to load and it had not. I used the chat option again on the 1St of February and was told to go to the store for assistance. All I want is what was advertised and I cannot go to the store and wait in line for assistance that can be given telephonocally.