Harrassed by security guard

Im a regular shopper at.pep...as i buy my childrens clothes here...yesterday i went to look for shoes for my son...on leaving the store the security stopped me and said he wants.to search my bag...if u gonna invade my privacy put up a note so i dont enter u shop then....searching a womans handbag is like asking her to show u.her underwear....needles to say i refused and he started shouting at me so i eventually open my 15x15cm bag leaving the store feeling exposed....thank you pep for treating a loyal customer like a common *****