Selldirect - I cannot complain about the service as there are not any. They have breached the contract.

I have a SmartBroadband wireless contract with Telkom. When my contact was due for renewal in August, Selldirect who is outsourced by Telkom, contacted me on behalf of Telkom to offer a deal cheaper than what I was paying at that stage for 10GB. The new deal was for 20GB at R269.00 per month, but the invoice since 1/10/2018 is for R369.00 per month. This was done telephonically on 28/8/2018 and supposedly all calls are recorded. I have send a complaint to ********** on 14/11 to which I had no response as yet. I have send a 2nd e-mail today. No response. I also visited my local Telkom branch on 13/11 (Gabby) who instructed me to log a complaint as they were not able to assist me. Since Telkom is invoicing me I feel that they are also responsible to attend to this issue as Selldirect is giving Telkom a bad name. This is also a breach of contract.