Unprofessional consumer practice

I had an insurance for my vehicle and a scratch and dent policy with MiWay, they were charing me 756r+99r altogether, I have not claimed from my main insurance with them, but I have used the scratch and dent, so when I cancelled my insurance with MiWay due to a better offer I received from another insurance company and the difference was amazing and it had all the same coverage and even more, I didn't cancel my scratch and dent policy. So MiWay took it upon themselves to cancel my scratch and dent policy one their own stating that I used the amount for the year. I feel I was victimised due to canceling a 756r policy and only kept a 99r policy. For 3years that I paid my full insurance I have not claimed once, so how much were they making from me, people all I want to say is look around scout for prices don't get fooled by the first one you get cause yourl will end up like me being victimised for canceling. MiWay owes me an apology and should give clients freedom to make their own decisions, not make it for them.