Mondo and Mtn

I am really not impressed with the service I got from mondo, one of their consultants called around mid October and offered me a package of 20Gb anytime data and R120 airtime for R89 every month for 24 months but what I got was totally different instead I got a total of 68GB of data no airtime or minutes for R276. I then called and told them that was not what I agreed on and I can't afford it, they then investigated the call between me and the consultant and it came out in my favor. I was then advised to cancel the contract and I was promised to be reimbursed my money by one of their senior staff member Zaheera, till now I'm still waiting for my money back and I'm still getting messages from mtn saying I need to make payment to avoid legal action and I don't understand why coz I've already canceled my subscription with them.