Requesting insurance schedule for my sisters whom I was paying premium for.

I opened an insurance with them in 2018 after being referred by my Aunt she also has an insurance with them. The consultant who was assisting me instructed me to take two insurance one I was principal member 2 Nd my sister was a principal member, but debit orders were going through my account. I happened to cancel this insurance and moved to Capitec unfortunately my sister passed on the 19 of January 2020 and Capitec cover had started in August and they want proof that I had an insurance. The unlimited can’t now assist me. They request Authority letters. Okay I don’t refuse to give them but I need a letter to hand into court so that I can get the authority letter. I had to take loans to borrow my sister. But the unlimited is holding me from getting my claim with Capitec. Iam no longer their client but Iam suffering. I have even told my Aunt to cancel her policy with you. Phillip from Yesterday putted me on hold for 40 minutes finishing my airtime. They keep saying my quiet has been sent to claims department. They can see I was paying for that account it’s their consultants fault that he never made me a beneficiary for that policy but I have to suffer.