builders express south gate ?

After spending R187,316 in a short space of four months from sep-2017 @ builders express in south gate. The innovator welding machine that cost R1699 stopped working early November, I returned it without slip and I told about the 7 day rule of exchange and I understood and the machine was taken back to the supplier. I picked it up in may 2018 and it only worked for 2weeks. Taking it back I asked to rather get another one since this one is delaying my work, then I was told that they cannot exchange for me since I don't have the slip. I then suggested to provide my bank statement and I was told that the transaction that shows on my bank statement doesn't reflect from their transaction history ? thank u so much builders express in south gate, ur services hurt the most. After the sum spent. Heartbroken so, I drive to cash build to buy another machine. Because I didn't see any reason why I should still spend my money there.