MTN dragging their feet when it comes to cancelling contracts and reimbur*****t.

MTN, via one of their promotional agents, approached me to take out a contract... I previously had a LTE contract from a other service provider and was not happy with the signal quality, so I moved over to Fibre. When MTN Approached me, I specifically told them I did not want a sim card deal, no LTE, I only want Fibre, the agent assured me it was Fibre, they can check their telephone transcripts. When the package arrived, I saw on the invoice it was LTE and I returned the unopened courier package to the nearest MTN Store as I was told to do when I called to cancel the whole contract. Now a month later MTN has not yet cancelled my contract and has now begun deducting fees from my account without my approval. I need MTN to reimburse me for the fees deducted ASAP. This is very poor service from MTN.