Security Tag

We went to Truworths Gateway on Friday to buy a dress for my mother as it was her father's funeral on Sunday. We checked to dress to iron it had the security tag on it. My quick is doesn't your staff check for such things and why didn't it make a noise when we left. Bottom line your *********** staff cause my mother even more grief cause we couldn't go back to Gateway because of time since we had to travel to Melmoth. We need a formal apology this is unacceptable.