Dishonest service provider

Eva-Last is a composite deck installer. They provided the decking material to replace my wood deck. We could only use their accredited installer, they recommended Decra Projects ***ner Joramu Kufonya), hence I could not use any other installer. Decra Project owes me R 5 600 from last year and has not returned my monies. I then spoke to Eva-last to try and recoup my money and they could not assist. Decra Projects did a bad job of installing the ramp and I had to get another supplier to fix this issue, whom Eva-last recommended (for warranty purposes, I had to use Eva-last's recommended supplier), the supplier is Ice Projects and Construction ***ner Constant De Witt). A month and a half after installing ramp rails, the rails began to rust, and they keep promising to fix and have not. Ice Project owes me R 1945 for services not rendered. Beware as Eva-last recommends dishonest installers for their decking.