debit orders

Hellopeter

problem started when this lady called and told me my devices were due for renewal at the same price,

i agreed and asked them to cancel one and re install on the new car i just bought, devices were installed on both cars as per my request however the price changed to R462 per month, i agreed.

first month R462 went through on the 25th and i was happy until 5 days later they debitted another R576 which i reversed, i called they acknowledged the error as theirs and told me it's rectified.

month 2 the very same thing happened only this time the R576 couldn't go through as i didn't have funds in my account and the bank penalised me R150 for unsuccesful debit order, i called again they still assured me it has been rectified.

month 3 they have done the same thing again so according to my understanding they now forcing me to pay from the R320 i paid monthly for two cars to R1038 per month for 2 cars.

another query, they are messing up with my credit profile and no one seems to care about it. i have to put up with these unplanned charges the bank will impose for debit orders not paid, what will happen to me if i really need their assistance as they showing me now that they are not dependable? should they need to investigate i am more than willing to listen to the recordings with them , which i was promised two months ago

i no longer need their services as they are the ones breaching the contract we had and i don't expect any penalties fro that coz i played my part, they just not willing to keep up, please assist Hellopeter.