Very dangerous and questionable insurance practices

Momentum failed to debit my account , I called in and they said there was no money in my account only to find that there was money in my account. They them tell me that I am in arrears and say they going to debit on the 16th when they know my pay day is the 31st. I then have money in my account and they fail to debit my account ,I ask them if I am insured they are not sure ,I spoke to at least 5 consultants and nobody's gets back to me even a supervisor. I then cancel the policy and give the consultant specific instructions to stop policy with immediate effect as they do not know what's happening. I get debited today 3 days later after cancelling and requesting debit order to stop. This company is very concerning fromy side and have serious concerns I wonder if they going to pay my money back I send them a mail to complaints department I don't think they will get back to me