Purchased the insurance from smart-driver club - t...

Purchased the insurance from smart-driver club - three months later I've received a letter through the post stating that my insurance will be cancelled in 7 days - as i have gone over my annual mileage - however i did not do any excess mileage ; it was a systematical error. I'd suggest not to purchase car insurance with this company as they do not value their customer - they even charged me a cancellation fee and a insurance non-refundable fee as i changed my insurance to another company.