Upgrade and did not received what they promised

In October 2015 the call centre contacted me to find out if I wanted to upgrade. When I was contacted by the call centre to do the upgrade I was informed that besides my packaged I will also receive unlimited data until end March 2016, this was also confirmed by the Telkom Springs branch when I went to do a simswap. I noticed that my data was finished and contacted the call centre again and was informed that when they activated my phone the promotion for the unlimited data was not added to the contract but she will lock a call for it to be added (this was 2 weeks ago) 3 days later I still have not heard from Telkom and phoned again and the lady told me that no one has attended to the previous call which was locked and she will lock it again and expedite it. Needless to say that to date no one has contacted me and still no data. This is in breach of contract and I will no cancel the whole agreement and rather go to another service provider which will actually give what was promised. I was thinking of getting wifi from Telkom but if this is the service then no thanks.