Taking customers for granted

My contract was due for an upgrade in May all though I was a bit skeptical but I took the upgrade in June. The package that I took included a free 10 Gig once off data. I received my package with a sim card. When I took the package I was told I will get my 10 GIg data on the day I took the contract. The contract day came but still I didn't get the data. When I contacted the call centre I was told by Duduzile from back office that there's was second sim card I needed to get where this 10G will be loaded and that this will be shipped within 7 days. A month later I'm still waiting for the sim card when I call the call centre I'm send from pillar to post. I was advise to call the delivery department, upon calling them there's no trace of the deliver on the system. If the was an option to rate this company a 0 I would have done so. Their help desk is useless, agents are rude sound like they don't even know what they are doing and they don't take their customers seriously.