Woolworths doesn't pay their workers

I did a wine promotion for them on the 1st and 2nd of February on their bridal expo, I never got paid by their service provider. I tried escalating the mater and reporting it to their Walmer Park branch since I was working with them, they said they have reported the matter to their head office till today. The next time I called, my call was not even picked up, I am so disappointed at woolworths and their staff for not helping me when I reported everything to them. They are the worst, especially Walmer Park woolworths