How long does capita to give you a medical interview?

Im currently in the application process for the royal marines. I applied late last year around September time and passed my interview and pschyometric test. I then had my medical phone call but due to previous medical conditions they declared me as medically unfit until the doctors declare me as fit. This was suppose to be done in november 2017 but due to my local GP messing up the information such as sending it back without a stamp or signature its left me clueless about whats going on. I recently got hold of them and sorted the situation and was confirmed by my recruitment office that its been sent to capita. I was just wondering how long it would take for capita to review my medical information and how long after until a medical interview is then given to me? Ive contacting the RO but currently the CPO is on leave.
Many thanks, Curt.