Bad Customer Service on Contract Upgrades

I was called by Cell C Agent last year Oct/Nov to advise that 2 of my Contracts are due for upgrade. I advised the agent that the voice contract should not be upgraded and only the Data Contract should be upgraded.

In February I had to call Cell C countless times to cancel that contract again and I was promised a Credit Note for the months where they've debited but it never happened. Finally since March no more deductions.

Now in April I found out that my Data Contract that I asked for it to be upgraded its actually downgraded. I was on a 20G + 20G contract with Router but now I have been downgraded to 10G only Data Contract. I called to complain and also asked the matter to be escalated but 2 weeks later no response at all.

Why will I upgrade to a less contract with no route and less that 2/3 of the Data of the contract I had. I was mislead by the Cell C Agent as I could have went for a similar Contract with other services providers if they were unable to offer me a similar service.

I want to cancel all my 2 remaining contracts due to bad Customer Service, been with Cell C since 2006 but I have to call it leave because of dishonesty.