Telkom contracts are ****s

My debit order increased from R883.54 to R1,255. I let it go the first month, thinking it's an error, and I will visit Telkom the next month.

I checked my statement afterwards and saw there is a R500 subscription I'm billed for, and I never subscribed to anything.

I checked the upcoming month's statement, and it says I will be billed R1,270. I've heard Telkom does this; I didn't think it would happen to me.