Incorrect details and not correcting. No responce

They were quick to call me to sell me an extended warranty. When I called back to confirm that I wanted it, it took 3 days to get through to them. Then I got my document and thought all was in order until I got an sms to say my debit order did not go through. Once again holding on the phone for 15minutes to get through to someone. The sales person had taken down incorrect bank details. My policy was on hold. The new agent said the details will be corrected and she will call me back. 2 days later I have had no call back. There is no record of my call on Wednesday and I am not covered. Another 15 minutes holding on trying to get hold of a supervisor. If only there was another service provider for a Toyota Extended Warranty as I would have gone to them in the first place!