Bad customer service

I have had 3 months motor and household insurance with iWYZE, and last month they tried to debit my account and it bounce as I had changed my bank account number. Last week I called them to update my banking details and also asked them to debit the money that was outstanding. I saw this morning that the money was still not debited, I called to find out and was told they tried to debit again and it was unsuccessful, after I had updated my banking details. Now they are telling me my policy has lapsed because I missed 1 premium and that if they revive it I would need to take a new policy and they take all my three cars for inspection all over again which I find ridiculous!! iWYZE please refund my two premiums and keep your policy I will find another competent insurer, or debit the correct account today and confirm my cover!