4 months without pay

I have been working in Russells Phoenix Plaza as a freelance sales assistant since the 1st of September 2015 and its been 4months and I still haven't been paid for the sales that I've done. Every month I've been made empty promises and still no payment. Management of Russells sit in their fancy offices and collect their bulky paychecks at the end of the month while we, the lifeblood to the store, the ones that do all the hard work, we don't even get paid? When we query about our pay, we are made to feel like we are asking them to give us their own money. End of the day, we are adults and we are working for our families, what do we give our children to eat if we are not getting paid for 4 months? Spring has come and gone, Summer is here and in a few days its going to be 2016 and still no pay? Is that fair?