Car insurance cancelled.

In 2016, I had company car and a private car. My wife was named driver on both cars.

My wife had a fault claim in my private car. The claim was settled.

In 2017, I left my job and had to returned my company car. I bought my new car and insured this through Aviva. As the car was too big for my wife only I was insured on this vehicle. When I explained to aviva about wife situation I remember they saying as she is not insured on the car I had quotation for her claim as named driver did not affect my quote.

I then had similar policy with admiral and no issues nor any claims. Again only me insured not my wife.

However in April 2019 I renewed my policy with coop insurance. I will have to admit, I cannot recollect which insurance compassion website I used and did to mention my wife claim on my policy as named driver 3 years ago.

As this was highlighted on insurance database, coop has cancelled my insurance for non-disclosure. I tried to explain this was genuine oversight and misunderstanding on my part, and that claim is disclosed by my wife on her own insurance since. Coop are quite adamant on their decision and do not want to reinstate policy.

Because it is now a cancelled policy, none of the conventional insurers what to insure me...any advise on how I can resolve this.