Utterly poor service and billing - LTE router cancellation and fees -

I went on a contract with cell c with a Lee data router. 3 months into the contract the service stopped working. After numerous calls and going to the branch Cell C confirmed that they have lost the contract with Vodacom to use their tower in my area, rendering my service useless. I cancelled the contract immediately, they still continued to deduct R400 per month for 5 months, amounting to R2500. On my September statement Cell C deducted a further R1298 for "contract cancellation fee". It's not my fault I had to cancel the contract it was theirs. So in total it cost me around R3800 for absolutely nothing. Case reported, escalated as always, no feedback. Unacceptable and utterly poor service.