Declined screen damage claim

Guardrisk declined my damaged phone claim, they say the device was not in use with the insured number of which is alot of bull.....why I would damage the phone in September and and make a claim in December while it's my personal device and number? Now I have been requesting information of the device that was in use with the insured number and then they cannot or wont provide that information cause it shows clearly that the device and the number are correct. It's been 5months without a phone and I have recently canceled the insurance and I am cancelling the phone contract end of this month. I am not going to ever work with Mtn and Guardrisk what a bad service and mistreatment from them.