I Want money back due to meHello, worked in Januar

Hello, worked in January 2015. At Molubi personal, (recruitment company). They promised me R4500 basic and then R500 petrol a month. On the 12 of january I asked for petrolmoney as I had to go see Clients. They could not help me with it. I resigned on 20th of january. There was promises of my money to be paid. I only received R1500 only yesterday 18 may. They still owe me R1368 . Which they refuse to pay. I do have a letter of a promise for the amount of R2868 which was signed in march. I am fed up for people that use people. And every week was a driffrent story.