If visa office made a decision on your file then you are not eligible to get a refund but if you withdraw your case when its in process ( before decision been made ) then you can get a refund.
after RBVO rejection means that they have worked on the application calculated points etc. . which means processing, so i personally think that you wont get refund after processing.
If you withdraw your case now then you can get refund but if decision is made on your case then fees will not be refunded either its rejected at the same status "Recevd by VO" or when it gets "in-process", once decision is made on your case no refund.