Iwyze took my money and blocked the bank from reversing a debit order

Around Sept/October 2020 I went apply for a CA policy at old mutual. I app**** over the phone, I was happy with the offer and I gave them my fnb banking details. I was supposed to take my for assessment to complete an application then they would send me the documents. Before all that the stop order was commenced. I don't have their number to query this and going back to old mutual takes a long time. Only on 16th of Feb 2021 that I got time to go to their offices in Durban. I called, they told me my car was not covered since I did not submit an assessment certificate. I asked where was my money going and they said only the car I will be colliding with is covered, but not mine. 2ndly why were they taking my money before I even have documents or the numbers to call in an emergency, as I was busy with them they emailed documents to me. I told them i am not happy about their service and it was not what we agreed on. The guy on the phone said what I was saying will raise an argument, I said I want my money back and withdraw the business with them. He transferred my call to the other person who also told me about arguments that will be raised and they did not want me to withdraw. What disgusts me mostly is when I contact fnb and they say they have been blocked, they can't reverse or stop this particular debt order. I must go back to old mutual. This is my money. How can somebody take my money when I say I am quiting doing business with them. What type of a company is iwyze. I f I had been involved in an accident, how was I supposed to get help since I did no even have their contact details. Why r they interferringwiyh my account?