dislocated patella at work caused a ligament tear..been on oji since march..too much stalling

.since dislocating my knee at work ,..I have been on oji..i,ve undergone their tests, shots in my knee and physical theraphy..but in the area where it tore there is still a sharp pain when I bend to squat..the attending doctor recommended non-invasive surgery for the area which I was glad to do to get my way of life back..has been a month since i've seen anyone,,repeated calls to insurance adjuster,drs. office, and my employer[who has been trying to assist anyway possible],only to find out my surgery has been denied.I am now using my personal sick leave days, which I accrued, to get supplimentary pay while still out,I cannot return to work with restrictions and am not ready to retire. can u be of any assistance