CONTRACT CANCELLATION WITHOUT SUBSTANTIVE REASON

I was recruited into ABSA short term insurance with a promise of being covered for all my short term needs such as household contents and vehicles against natural and accidental phenomenons. I received an unsigned and unauthentic letter without letter heads on the 21 July 2015 informing me that \we hereby give you 30 days notice of cancellation of your policy effective 01/09/2015 due to your claims experience being to be above average". I have made several efforts requesting the policy or rules that informs me as a client about the threshold of claims that could lead to cancellation of policy but without success. Browsing through my claims history there is no single element of negligence"