Unfairly canceled insurance policy

I've been with old mutual insurance for 4 and half years, and in that 4 years I've had 2 windscreen claims, 1 rear window claim and 3 accident claims. Few months After my last claim they canceled my policy without warning me. This is a pathetic experience because now I am struggling to find a proper car insurance. This was an unfair cancelation because if they warned me after my last claim that now I'm becoming a risk and if I claim again they will cancel it would make sense. After being a loyal customer this is how they reward me wow. Insurance nowadays is more of business than people's sincere am I not supposed to claim from insurance? What is the purpose of having insurance?