Worst company don't pay your monies due

Absolutely disgusted in the way employees are treated, some employees were just let go with no notice, and hadn't been paid. They were promised their monies by no later than Friday the 14th of April (including their 1 week notice pay, because the staff complained that they were just let go, 1 of the directors of the site said fine they will pay them then their 1 week notice) today, the 15th of April still no monies. We have sent messages and been nice and they are just ignored, the director reads the messages and just ignores the staff, she made horrible remarks and I have everything in writing on whatsapp, as well as the directors details. This is for the Birchleigh train station.