Terrible Client Service from Car Zone Bloemfontein / Auto Rentals

I have a rent to own vehicle contract with Carzone Bloemfontein. However have received very poor treatment from Mr Ian Schonborn yesterday. I pay my installment monthly on the 1st of the month, however I swithched bank accounts and with the switch over I entered the Carzone bank details in and switched two digits around in error. Mr Ian Schonborn contacted me yesterday asking for the payment to which I responded that it was paid on 1st January which at the time I was unaware of the incorrect account number. I forwarded him the proof of payment to which he accused me of false proof of payment and said he will contact the police. I told him that it is not fake and then he told me the account number is incorrect and it went to the wrong account. I told him that I am sorry for the mistake and will contact the bank at 09:00 when they open and see to retrieve the payment and pay it over to the correct account. Since that message I have had threats, insults and he went as far as to instruct the vehicle to be collected. I paid the installment over to him before 9:30 and he sent me an email saying I can go ask FNB for my money back as he is cancelling contract. His lawyer was then in contact with me and I explained the situation and that it has been rectified. He said he is then cancelling the collection of the vehicle. Yesterday afternoon however Mr Ian Schonborn then disabled the vehicle via Tracker and we could not use the vehicle at all. All this after we had to instruct a mechanic to see why the vehicle would not start as we were not informed by the hirer that he disabled the vehicle through tracker. I contacted Mr Ian Schonborn to enquire again to receive horrible messages and threats in this regard. This was an innocent finger error with payment and not intentional default on payment. However was treated like scum and accused of committing document falsification to which was not even apologized after it became very obvious that it was in fact error and not intentional default. Never in my life has a stranger, that does not know me at all, insulted and spoken to in such a horrible manner.