Very Dissapointed

I bought two pedestals in September from Mr Price home( Retail Crossing) which in this month they both fell apart, I went to the store to return them and expectedly so I lost the slip as I was not planning to return. but luckily the stock code and price was still at the bottom of the pedestal so I though that should make things easier. I was told that the information wont help at all the only thing that will help is bank statement, the store manager was answering with attitude and was unable to answer my question. She said since I don't have the slip I need to bring a bank statement of which I asked what if I paid cash, she said she doesn't know with and attitude and said then we won't refund you( I think the lady's name is Miriam(I might be wrong, but she has a scar on her forehead. that's when I asked for managers contact. she gave me a number which I have been phoning for three days with no answer, the email sent was never answered, so what Is left is for me to go back to the shop and be told that the manager already left as I get there in the afternoon. so what else can I do, very very disappointed with the service, I had to phone MR Price Group of which I just got a different email address hopeful that will be answered.