Cancellation of contract without my knowledge

I was a client to Miway since June 2015 and August I had an accident and my car was written off and they settle it. October 2015 I bought a new car and take miway insurance and December and January I realise that the premium was not taken and when I enquire they say I have cancelled but I do not remember cancelling my insurance. On the 03 February I enquire and requested them to renew my policy and they told me I am a high risk they cannot assist me.