Hello , 

as your query is you want to apply for fee refund process in the CS ab special round and corresponding Li that when how much time does it take to refund the fee.

I want to tell you that you need to visit the corresponding site for CSAB and their you may find a link regarding the fee refund process where you need to fill the form or you can just contact with the the known person from the counselling cell for their website and they will help you out with that well now talking about the time it may take a long all good period of time because they have few other things to go with and such issues process is still going on with the large number of students whose fee is needed to be refund so you can expect the fee to be refunded at near about the month of December to November.

Thank you.