Feel a bit done in with upgrade

Good day,

I called in about 2 months ago to enquire about my data contracts, as there is 2 and the 5 gig account i have never used and there was a 20 gig on number ***. I then told the call center angent to cancell that line, as its a data only and i will use the 5 gig account. She then explained a mucg cheaper option with 20 gig data, and R150 airtime (which i find a waste as i cant call from a mobile modem) i then agreed to the new terms and extended my contract. Today the router stopped working, so when i called to follow up, i was told this is a airtime only contract, this was upgraded to that and the 20 gig was a once off only. I was a bit shocked abt this as its a useless option as its in a router and can not do voice calls, so i dont think i would of agreed to this. I then asked the consultant if they can listen to the call, as the call is the binding contract to upgrade. He got back to saying that all was in order, i then asked him if it was explained to me as a once off only.... the agent was hesitant with an answer and felt like i just got a yes answer to get me off his back. I then asked for the copy of the call that was made from ***. He advised he is not sure thats possible and if i cancell my line there will be penalties.

Kindly can i request a copy of that call mailed back to me please.