Dabbing the ingrown hair with a warm wash-cloth may help release them from under the skin, exfoliating will also help. The area to be waxed needs to be very clean and dry.. u should dust the area with talcum powder this helps the wax adhere better to the hair and not the skin, which means less aggravated skin.
Wipe with chilled rosewater to seal all the pores, u'll notice less ingrown hair. Gently going over with phitkari/alum will reduce the hair-growth over time.