Telkom Misleading

We have been at Telkom for almost one year, using LTE 20/20MBPS but never got more than 10 mbps. We are living in a very rural area and thought that that must be the problem because of the distance between the towers. We are a very small town in the Northern Cape, so we stood together and as one app**** for Openserve Surve to install Fiber lines, so they started in February this year. At that time, I was a customer of Telkom on the LTE so decided to stay with them when they were finished with the fiber, so I app**** for pre-installation and was approved. On the 26 of April, all fiber cables were installed, my router was delivered, and I went life for the first time, I signed a contract for R549 x 12 Month, the line 50/25 mbps, that was Ok for me until the first bill arrived by email. R885, I contacted them and they said that Telkom has increase their prices...Unbelievable, I'm 3 weeks on fiber and already on a price increase, they want me to downgrade, there are 2 numbers, a B number and a TIN number, the B number they said is my account number and the TIN number is tax added value, make no sense because I signed for R549 all included, I'm so disappointed in Telkom. They even billed me from the day of the Pre-installation. Very Very Disappointing. Still waiting for the Manager to phone me back!!!!!!!!!