Cell C insurance

My phone was ****** 2 weeks ago. I have device insurance. I submitted an insurance claim and I am being given the run around. They are saying that my contract was activated on an 062 number yet from day 1 I have been using an 082 number. Even when I call Cell C they can pull up my account using my 082 number. When I got the contract I ported in my 082 number from vodacom. So now cell C insurance is saying that they need proof that I changed my number. I was advised to visit the Cell C store that I got my contract from. I went there today and they were useless. They are saying that service agreement does not show that I ported in my number. So they gave me my latest statement and it shows that I use a 082 number. I called insurance and was on hold for 20 minutes then they dropped the phone on me. I feel they are looking for ways and means to deny my claim yet I am paying from the contract and insurance.