Bad Customer service

For no apparent reason I was sent an sms cancelling my motor extender policy, contact details provided were that of the underwriter. I contacted the underwriter who informed me that I should contact Hollard as they are only the messenger. I contacted Hollard Michelle Peach her PA who informed me that someone had been in touch with me few days ago this was not the case. As long as we have have claimed from the policy we have followed all procedures , we have been told that we have not followed procedures and that we have claimed more money than we should have. We have been told that this is non negotiable and if we like we can go somewhere else.