Worst service in the world.

Three months ago I received a phone call from an MTN salesperson telling me that my contract was expiring and that I needed to sign up for a new contract. I was offered 14GB day data and 14GB night data. Since then I have only received 4GB day data and 14GB night data. 10GB daytime promotional data that was supposed to be provision has not been provisioned. I have sent countless emails and logged countless tickets with MTN's utterly useless call centre agents and 3 months later I am still not receiving what I am paying for. I have even been to an MTN branch to try and get assistance but they say that they can't help me. I am so over the absolutely useless service and ******* being conducted by MTN.