I contacted Abacus Insurance Limited in connection with a policy I took out for my brother and his wife in June 2017

I contacted Abacus Insurance Limited in connection with a policy I took out for my brother and his wife in June 2017. I arranged for the premium to be debited from my account on the 25th of every month. According to me they debited the account, because that was the agreement between myself and them. I decided to call to find out why my account has not been debited only to find out they stopped debited from my account due to insufficient funds. I told them that is impossible. They said they sent me a message to inform me about my account that has been suspended since October 2022, but I never got the message. I asked what the number was that they notified me of the suspension they gave me an old number that no longer belongs to me. There was no reason for them to suspend my policy. I've send them proof of my September 2022 and October 2022 statement to show them that there was more than sufficient funds available for them to debit. I asked them to reinstate my policy with immediate effect but they consultant told me they will not be able to do that. I would like to know what happened to my money that I paid, if they can't reinstate my policy I want my premiums back because there is proof that I had enough funds in my account and I also provided them with my updated contact number. I am not happy at all with Abacus.