Refusal to process my claim

I insured my car with Hollard last year june/july. I sent all my necessary documentation to them. Including my drivers licence which i obtained in the USA. About 1 month ago i had a car accident. I report it the car involved had there car fixed. My car has not been fixed because Hollard say that my drivers licence is not valid. They gave me a call to say they we told to cancel my insurance and give me my money back. You took my money for almost a year now that it is time to fulfil your part of the contract. You cancel because you dont want to do it. If my drivers licence was not valid last year why did you not refuse me.I would not have bought the car. I need urgent assistance please.