Ridiculous Charges

A mishap with my bank resulted in Telkom's debit order being returned unpaid. After calling Telkom , The Payment was made cash at a PnP a few days later. I was not informed about the ridiculous debit order fee and my account the following month was debited with R325 and without my knowledge of this I thought it was a Part Payment of the usual R600 a month I pay. I made it clear to the consultant that this figure was something I had never been made aware of. It was expressed to the consultant that I did not agree with the fee, nor the ridiculous +/-50% increase (from R135.65 to R200.94) and that I would not pay it until it was explained to me. Just debiting that amount with no explanation, which according to me is ********* and bordering on **********. This fee is not something that is clearly stated on my contract, on your website nor on any communication from Telkom - let alone the outrageous increase. Telkom has been unforthcoming and purposefully tricky in the way that this has been handled and I request that this matter is escalated. After Paying this amount I am now told that I have missed a debit order due to Telkom debiting the R325 instead of R600 like it should of been , I find it absolutely ridiculous that I am now required to pay a double installment.