Was I ****med by Fonesure?

I was sold a mobile MTN device over the phone. It was received. Shortly after I was contacted and sold phone insurance over the phone. I recall that it would be easy to cancel if not needed. I never got the policy and have never been called since. I don't know the T's&C's. I have paid premiums for probably 3 or more years. I cannot find out how to make a claim or even cancel the debit order. I have been trying to do this on and off for probably 2 years. I have contacted MTN a number of times. The debit order says FONESURE. who and what is Fonesure? I have tried any and all contact numbers I can find for them with no luck. The number/s MTN gave me of *** not answered and ***5 does not exist. Am finding this process unprofessional in the extreme and its causing me financial prejudice. I want to lodge a claim for the lost phone and/or cancel the debit order and obtain a historical and total refund from the outset. I am reluctant to cancel the debit order as it could prejudice my claim. I am fed up.