HI
THANKS FOR CHOOSING HEALTH CARE MAGIC
improvement in height can happen before epiphyseal closure of long bones,which might have completed in your case
good diet and exercise may help you a little ,but this cannot be assured
limb lengthening surgeries are becoming popular now a days,you can consult an
orthopaedic surgeon for more information
going for artificial remedies is not healthy as well as they may not be useful also
but as your father says he gained height at 22 which may not happen in many cases ,it is likely that you may gain height
take foods rich in protiens ,calcium ,try to focus on taking a balanced diet
few yogasanas and exercises may help you with it.
hope i answered your queries
feel free to cotact me for further queries
thank you