TELKOM CONTRACT PHONE

I bought my phone in July at Telkom in Kimberley.

I signed their agreement to deduct/Debit money every month on the 5th which they did not instead they have been deducting on the last day of the month.

Come month end of October, they debited money that we didn't agree on which was an amount of R605 whereas we said the monthly installments would be R344.

I called the call center and we concluded that they will change the date to the 5th but they never did that.

The day I bought the phone, it was not unwrapped in front of me but it came open from the back at Telkom stores, I'm now stuck with a problematic phone that switches off at any given time.

I contacted the manager on WhatsApp during the week and he told me there is nothing he can do he has resigned from Telkom and there after blocked me on WhatsApp. Only to find out they charge you R200 if there is no money in your bank account. they tried to debit on the last day of the month which is not the day that we agreed on in the first place and they found no money.

now, I have extra charges due to their negligence by not going through the papers I signed thoroughly.

How do we resolve such?