globelifeinsurance Will not replay till called and will not send the legal copy back that I asked to be returned Texas Nationwide

I had a Life insurance policy that my grandmother bought when I was a boy. So globlelife needed to see that she past away thru a death certifcate to see I owned the policy. Because at age 27 the wholelife policy sky rocketed and was unaffordable. So my father lent me my grandmothers last issued copy of a death cerifcate from the state that I sent to golble life insurance to see if there was a cash value, because they could not say nothing on the phone. In the letter I sent I specifically asked for the state copy back and they at globelife sent a photo copy that is against the law and said so at the bottom of the state copy. Globelife broke the law and after talking to numerous people at globelife that promised that said it would be returned, the last one said no its a copy. But ok its a legal copy and mine. I dont know why there insisting on keeping it our business is concluded. I know it just small potatoes but it was asked for when I sent it and promised by some of there at globelife employees after they sent a illegal copy. I have been stolen from and want it back.