Worse service ever

On the 29 of November I bought size 5 pumps for 69.99,using my jet store card for points and my debit card at Jet mall ********** wore the shoes the following in just a few hours they were teared.Because I work a bit far from carnival and I knock off late I then requested my mom to return the shoes,I had already thrown away the receipt however she had the card for points which I use and was told the can use to retrieve previous reciepts. Apon arrival at the store,my mom was assisted by some ladies which one of them appeard to be manager.The told her the can not exchange the goods without any receipt as there is no proof that I had bought the shoes @their store,she then explained that we had called their head office and the confirmed that they can retrieve transactions that were performed with my jet card for points.The lady (with a very bad attitude)tells my mom that it does not matter what there head office said,but she will not take those shoes because I had bought a smaller size,which I don't know where she got that from because I have always wore a size 5...My mom as furious as she was she left the shoes at the store. I called the store on the 10 Dec and was assisted by Betty and was very rude to me when I told her about the incident that had happened with my mom,she told me I'm failling to listen and she can not assist me because I don't know my shoe size even if I can caĺl their complaints department..