Pathetic service

I'm sick of this company I want to cancel this company pathetic service I have installed a unit in my vehicle in the second week of August the sales consultant informed me that at the end of August I would only pay pro-rata and end of September pay my normal installment, so with that I then said I would like my debit to go off on the 27th of every month she said no problem, so well end of August came no debit went off on the third of September the debit decides to go off and not the amount of pro-rata I was told the whole amount plus pro-rata they tried to debit so the debit came back rejected I then sent emails asking why has this been done, well I only got contacted a week later, I then informed that lady that why was my debit set for the third of September and y was I debited full whereas I was informed of only pro-rata she said bluntly to me oh that's for the new month I never made a big deal of it I left it I then informed her please make a note on the system for my debit to go off on the 27th she said no problem, today is yet the 27th of September and still no debit has gone off this is pathetic service I don't want this service anymore I'm only on my second month and I would like the relevant people to contact me to cancel this as it's only goin to give me problems in the future I don't wish to have it and as per the CPA law I have every right to cancel this product within the 6 month they can gladly come remove their unit I don't want it. My contact number is ***