You should stop oral antibiotics
as they are not working. You need to concentrate on local therapy. I would suggest the following
1. Retract the fore skin as much and clean the underarea with dettol
soap and water twice daily.
2. After washing the area mob it dry.
3. Apply a gel called chloroapplicab to the raw area over the penis. It is a antibiotic gel and will work on the raw area.
4. After the wound heals completely and still if there is problem with retraction of the foreskin then you may consider circumcision