Unauthorised debit

I have one vehicle financed through ABSA, they recently requested proof of insurance as this apparently has to be checked on a regular basis, no problem totally understood and sent them my proof that this vehicle was insured. They then queried another vehicle, that I had financed through ABSA over a year ago. I had to get a letter from ABSA to give to ABSA (yes go figure!) to prove that I no longer owed money on this vehicle - it had been written off over a year ago! I then get an sms stating that I have failed to supply my proof of insurance and they will now debit my FNB account for my vehicle to be insured through ABSA insurance. I call again, spoke to Amanda Lyon, she informed me that they still need proof of insurance for the vehicle that is not financed through ABSA any longer. I then have to resend the proof that from ABSA to ABSA that I do not owe any money on that vehicle. Right, think all is now sorted - well clearly they don't give a toss about customer service, don't even respond to emails - get notification today they have debited my account for their insurance for a vehicle that has been written off and settled.