Worst service ever......

I was sold an upgrade in September 2018 on my data contract with MTN. The contact was sold by Mondo team for MTN. The initial contract was 5 GB + 5 GB night surfer. I was then told by the agent that I will receive an additional 3 GB anytime promotional data p.m x 24 months. I could not believe the deal and asked the agent to repeat. I immediately decided to take up the upgrade because of the great deal. then reality kicked in. First month only received my 5 GB + 5 GB night surfer with only 1 GB promo data. I was sold 3 GB promotional data. I immediately contacted MTN via their social platform and was told I need to log this with Mondo. Couple days later I called Mondo to log my query and agent confirmed, that after listening to the recording of the contract the agent sold me, was indeed 3 GB promo data and that I need to contacted MTN billing who will rectify the issue. I sent MTN a copy of the contract and told them what the Mondo agent told me. After more than 6 different reference numbers received, MTN now referred me back to Mondo as they did not deal with me directly. After 2 months this is how they resolved my query. I want to cancel my contract immediately and will not be held accountable for the early termination.