Unauthorized debit orders

I recently had a very bad experience regarding this insurance. I had an insurance advisor named Shaun Herbst come to see me regarding my current insurance policy with a different company. He asked for my current schedule and came back with a quote from Auto and General. He said he will sign me up and see if I can get a further discount on premiums. I specifically said I will stick to my current insurance until he comes with the "improved" quote. Shaun took my bank account details and promised me there will be no debit coming off my account. Low and behold the end of last month an amount of about R7500 came off my account! I phoned him straight away and he promised me to sort it out. I also phoned A&G who said they will cancel the policy (which I did not agree to) and refund me. Which A&G did. Now this months some of my debit orders did not go through! Which I get penalized for! Especially when you have a medical aid and have a terminally ill family member dependent on that medical aid! When I checked on my bank statement, A&G again took R27646.85!! And to make matters worse, thats apparently the premium for fully comprehensive insurance for a 2011 Kia Picanto! I dont even own that vehicle any more! This has put me and my family in so much trouble and hope it will not impact on my financial score or the health of my family dependent on my medical aid for survival. Either A&G messed up seriously or the adviser Shaun Herbst. This was probably one of the most unpleasant experiences I have ever had!