Telkom Contracts do not uphold its terms!

Hello

I took a 24 month contract with Telkom last year, 24 months at R599, After one year into the contract, Telkom have increased my monthly payment to R652,26. After phoning Telkom numerous times since yesterday, I have received multiple reasons for the increase, one being a VAT increase, if that was true it would be almost a 10 percent increase in VAT in August???, I need to watch the news more often, as I didn’t hear about that. Another reason being, there was changes in my account in August or September which they cannot see on their system??? but they assume. When I asked how can a fixed amount contract increase before its term is completed, apparently it just can. When I asked if I can speak to someone else like a supervisor in the Sales Department, unfortunately I was told they won’t be able to help me. That brings up another thing, when I called the Billing department, they can’t help me, I need to phone the Sales department, and when I phone the Sales department, they say I need to phone Billing,

Anyway, i manage to get one reference number, which is 01.10.2019(Date)1:58pm(Tiime)Nosipiwo(Name)

Thank you