PayJustNow charges ridiculous R145 additional for debits, unexceptable.

I received notification on Sunday 27th of insufficient funds and debit being redirected to another date. I did not react because my full salary was still in my account and no other debits had gone off. On Tuesday I called PayJustNow and spent almost whole day to resolve this. I called my bank to confirm if there were any reason why the debit did not go off, they could not find any reason and they received no notification of a debit not being deducted. I explained to the agent Saleem and he advised to escalate to the technical department. Today I called as I did not receive any feedback but was told "not there fault" this is the poor service of PayJustNow and I am being billed R145 on each debit not being deducted. Your customer care line is pathetic because I've called whole morning and the calls are cut at a point. Your chat line doesn't have options to assist with all queries. And the agents professionalism is poor, I could hear there conversations in the background.

Why should I pay R290 extra on my debits and enough money was in my account?????