Bad customer service

If I could I would give them - 1 star or even . My dearest Mommy passed away today exactly 1 week ago. I am devestated and really on a bad place. I spoke to my daughter and she said she would help me with a outfit on her Mr Price account. We decided to go after work but she was not feeling well and her little one is a bit fussy and wanted to sleep early. She gave me her card and said I could use it. We went all the way to the Canal Walk store. Chose my outfit and then went to the cashier. I was served by Sinesipho (SIBAM). When she put the card in my daughters details popped up. She asked me if it was my daughter and I said yes. She then told me I cannot buy in the account. I told her that this was for my Mommys funeral on Saturday and that my daughter gave permission. She kept saying that my daughter had to sign. I even phoned my daughter and I asked if she could maybe speak to the supervisor. They kept insisting that there is nothing they can do. I once again explained that this was my only chance to get something to wear for the funeral. We even offered that my daughter can send her signature over whatsapp or email. The refused point blank. To top it all they did not even sympathized with my situation, or is this also part of their policy? The cashier even had a grin on her face the whole time. I know there is policies but my goodness there are surely exemptions. My hubby had no choice but to use some petty cash that he had on his bank card to buy it for me. This will however be the last time that I ever support Mr Price. These people have no sympathy - I can tell them Karma is not far away.