Vodacom fibre *****

So I bought fibre from Vodacom, where I explicitly stated and agreed with the agent on 10/10 mbps, the first two months my speed was okay but all of a sudden it was reduced to 10/2 mbps. I called and emailed vodacom for four full weeks with no outcome, these people don’t give a **** about any of their customers once there’s a contract. Over 20 SRs later, some R Maart charecters emails me and say he listened to the recording and the package was 10/2, while they are refusing with the recording. I mean I remember perfectly at the end of the sales phone call saying to the agent “what if I am not happy the 10/10 mbps and want an upgrade to 20/20?” To which the guy responded “you can simply call us and we will upgrade it for you”. So if at this stage he heard me and I was making a mistake he could have easily corrected me. They simply reduced the speed without my consent hence the refusal to provide me with the recording and they are covering for one another in this *****. People be careful with Vodacom Fibre. What also confuses me is during my attempt to get this resolved, there were several consultants that confirmed that my package was 10/10.