COMPLAINT-DISAPPOINTED IN THE SERVICE OF A FACTORY FAULT ITEM!!!!!!!!!!

I am disappointed in MrPrice's service. I am a regular shopper and just had a horrible experience. Last Monday i purchased a boot that was marked down. I wore it for the first time that Thursday and it the material started tearing as its corduroy and i went to pay my account and showed the cashier who helped me and said i was going to bring it back. I went to Rage after that to buy me a shoe as i was afraid it would more then id be embarrassed. I could not find the receipt as i bought so many things at other stores and probably threw it away. I go to the store today to take the boots back. They tell me they cannot help me as i dont have a receipt and i paid cash for it. They cnt go back to last Monday to trace it, its not easy. I said i dont want my money back, give me something else for it for the value of it as i purchased on marked down price. They tell me they cant do that because they dont know if i purchased other items and if that was a free item. It happens that the same lady helped who is aware of the boot and called the manager. She can see its a factory fault, the quality of that boot is poor. How can you tell me you cant help me. i have rights as a customer and i am not happy with this man!!!!!!!!!!!!!! what must i do with a boot i cant wear.. I am disgusted and disappointed. Never have i had an experience like this. If something is damaged or a factory fault or the quality is pathetic, i have the right to take it back or exchange it. i will close my account and share my experience. Never did i feel embarrassed in the store with the service i received today.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Be-careful guys, this is how our money is taken away by buying things we are not allowed to take back when the fault is not yours. This is a factory fault, it is so visible!!!!!!!!!!!!!!!!!