Mission impossible with a Voice recording!!! Such a pain.

I have been on phone calls using my own airtime and money for about 2 months now just to try and get a hold of a call recording from Vodacom. They claim I upgraded my data contract with them last year May and I have no memory of that. I requested a voice recording to support this as I have been paying for this and wanted to cancel the contract but could not because I had this new contract. Why is it such a tedious process to get me a call recording of myself and a consultant if I indeed made the upgrade?

Two service requests have been logged about this issue and both have been closed without anyone contacting me for a solution. What manner of carelessness is this Vodacom? I have been a loyal customer for over 10 years and you guys treat me like a dirty rag. I want to cancel this contract if and will continue paying it only if proven that I asked for an upgrade.