Truworths Balfour Mall incompetence

The incompetence of the staff in Truworths Balfour Mall is out of this world. Yesterday 21st September 2022 I drove to Truworths Melrose Arch around 16h30 but unfortunately due to loadshedding it was closed. Decided to go to Balfour Mall Truworths as I was doing an exchange for a trowser that my fiance bought last Saturday on account. The sales assistant said that I need the account holder to do an exchange. I mentioned to her that it's only an exchange and I had the receipt with me. She called her manager and said the same thing. But I had to drive all the way just for them to tell me this. So please advise Truworths, as on the receipt, your terms and conditions said you only need a receipt to exchange not an account holder.