REVOLTING SERVUCE PEP store

Inferior quality lethargic service. I bought a pair of sandals from PEP on the 18th September.. have worn them exactly 3 times and on both left and rights shoes, the middle piece that goes between the toes has pulled. I explained the situation per email who assured me that my complaint would be addressed timeously......still waiting. I then went to Hillcresh branch in the hopes they might assist. They said they did not carry that particular sandal. I requested a refund and this was refused as I did not have a slip. I have however the payment made per my debit card. They still insisted I had to exchange for something of the same value. After my patience was running thin I picked up a pair of tekkies which were more expensive and informed them I would pay the difference. This now upset the apple cart and the lack of attempting to assist me was blatantly obvious. I requested the defect sandals back and stormed out the store. Where has the friendly smiling obliging service gone?????