The most difficult company when making claims

I have been having countless problems with this gap cover, and I am on one of the highest. They keep telling me that there are documents outstanding, and so I run around and make countless calls to get all the documents, only to be told once again that the documents are wrong. I really cannot understand what they want, because I have even copy and pasted their emails and explained over 10 times to Discovery what Zestlife wants, but they are still giving me issues and refusing to accept the documents. I honestly give up with this company. To top it all off, i was called and told that we will be assisted and our claim will be given priority, but now we are being ignored, and when I call them I am told that I need to call Discovery. I have called Discovery 100 times what more does this company want?!