Vodacom Contract

Vodacom is full of **** honestly. I got an invoice of R686.86 which is due on the 25th December however to be taken on the 27th due to the holidays.

I made a payment of R200 on the 7th December which reduced the amount to R486.86. I then made a further payment of R500 on the 22nd December which left me in credit of - R13.14. All of a sudden I then get a message saying my DD return unpaid and I'm charged a Penalty of R100.

I called asking for the Penalty to be removed because I made the payment, it's not like I did not pay they have the proof and they can confirm that I paid. The stupid ****ers (I'm sorry for my language) said I still have to pay for the penalty even though I paid well before the due date. What the hell is this. Like Vodacom still keep on messing things up and this will affect my credit score.... Dear Vodacom can you remove this penalty as this will just affect me showing as a missed payment.

Can that penalty be removed under my name before my credit score gets affected.