********** telkom overcharge for a R99 contract

so I took out a contract with Telkom last year. initially the monthy subscription was R99 for a hisense 920 since I got the phone it never worked properly switches off, freezes, and I cannot use any of the apps. I took the phone back they gave it back as is said it was fixed but gave a screen protector.

I wasn't happy complained and nothing was done.

then from my monthly paument being R99 it jumped to R460... mind you this is a top up contract so no out of bundles nothing. so I called Telkom they said its due to vat increase... I was confused cos how can vat make the payment go from R99 to R460.

I complained on hello peter as I wasn't getting any assistance and they dropped it to R130 pm.

for the past two months Telkom has been deducting more than R300 from my account for a stupid phone that I cannot use.... I want an explanation as to why I must pay so much and I want to cancel this contract with no penalty fees. I am tired of the same thing happening. Telkom taking advantage of most of its customers and just doing as they please. I don't want this contract anymore I want it to be cancelled ASAP and if not I will take this to the public... please can this **** contract be cancelled ASAP with no penalty fees.