Bad customer Service

On the 12th July 2022 I went to Truworths Kolonnade to exchange shoes. When I got there, I was helped by a polite guy called Lebo,who explained to me that I cannot exchange without a receipt. I requested a gift voucher but again he mentioned I cannot do that also, the matter was escalated to the manager(Doreen) who gave me an attitude. She said to me, and I code "you want me to leave my work and help you because you lost your receipt?". I believe I'm a customer, me being there it means it's also part of her job. Ultimately the matter was resolved because I was given a gift voucher at the end. I am not happy with how Doreen spoke to me. I strongly believe that Customer Satisfaction must be a priority for any business institution. Irrespective of that I lost a receipt she was not supposed to treat me like that.