DISABILITY CLAIM - :-(

I have been struggling with a claim for my father who is ill at home, i was appointed to deal with his claims. Everytime i submit forms a month later all of a sudden there are more forms it becomes really difficult and its form after form after form and no luck. This is for a disability claim my father has bad diabetes so there is no way he can work or get an income. He trusted Old Mutual years ago and now they treat him like this? we have really followed up and filled in the forms as well as all the medical reports BUT they drag it out. I will move all my business from old mutual as well and i am going to convince my company to more theirs too its just too negative.