Tedious claim process

Ref number ***2. We filed a disability claim but could not provide a letter from my husbands last company Quatro Plast because they refused stating that he is no longer in their employ, even though he fell sick while employed. Dealing with a state hospital we provided a report from the occupational the****** which is clearly indicative that my husband can no longer perform his duties BUT Old Mutual is still insisting on a report from the physio the****** stating that my husband is receiving treatment.. We tried desperately to get this report but they are always changing the physio the******. But should not a report from the occupational the****** suffice? We provided reports from our gp, doctors from the hospital, MRI scan reports all conclusively saying that my husband can no longer do his job and that he has a serious issue... But our claim is on hold for a letter from the company.. And a report from the physio the******.... While we stand to lose our home. We even offered for Old Mutual to do their own assessment. We are so tired of hearing admin department is sorting our the issue but nothing gets done.