Fast and furious couriers is a useless company to work for

I had a very bad experience with this company I was given 1 week to know the whole off westrand .everyday I was put in different area to work after the 2 week they expect me to complete my delivery. I paid joining fees and was not even given a sent back after only been 1 month working form them. They refuse to pay me my 12000 back They dont resolve their queries