Write off the R7. 90 cos I am not paying it.

I was with car track since Jan 2020 and my 1st Dr order was end Jan 2020. CAR TRACK did not do my debit order even though there was enough funds instead threatened me that I was in breach of my contract and forced me to make a payment. Since I had funds, I made the payment yet they deducted money as well leaving my acc in cr. It took them 3 months to sort their mess out and every other month they would not do my Dr order on the date which I requested. I changed jobs a few times and informed them of my new salary dates but every month they would not do my Dr order on the correct date. I then emailed them several times asking why they constantly undermine my request and NOBODY responded. End August 2021 I received numerous calls and found that once again payment was not deducted. At this point I was not going to make any payments. I was done and requested to cancel the contract. Nobody responded to any of my emails. They kept calling me and I could not answer hence why I used email as a mode of communication. I received an email that the contract had ended and I emailed them to let them know I would make payment monthly till the R207. 00 was paid in full. I decided to make a R200 and received a call asking to make a payment arrangement. Told the lady I paid the account already to check their bank statement. She hung up while I was talking. Last night I found an unauthorized R50 from car track and reversed it because there was no response to my payment arrangement which I requested. I owe them a R7. 90 which they can write off cos if they **** service. If my dentist can write off a R40, so can you!