Facing issues in medical claim reimbursement

I underwent black fungus treatment in RML Hospital New Delhi,  after discharge doctor advice to take four week medicine from home which is written on my discharge summary, I followed the doctor advice and continued my treatment accordingly after that I submitted my mediclaim form duly signed by the doctor along with all necessary paper in original but TPA team has raised query , I reverted on the query , but they again raised query  in this way they are trying to trouble me so I can close my case