House & Home; Refusing to pay.

I am a former employee of House & Home, and after my resignation I am struggling to get the money they still owe me. The month before I resigned there was a problem with my hours, I received a short-pay of about R1200. The problem was corrected in about two weeks and the money was payed out, at the end of the month the exact same amount was deducted from my pay and was listed as an “Offcycle advance”. The month I left House & Home, I received about R2800 less than what I should have received. This was 2 months ago and I am currently getting no help from anyone to correct this problem. I spoke to a person from HR and he assured me that he’ll call met in the next hour, it has been more than a month and still I’ve heard nothing. In total the company owes me no less than R4000.