verry unhappy supplier

these guys are very *************, the take and don't pay, they wanted me to come out to repair their truck on Christmas day, to which I refused, I helped them on the 3rd of Jan 24, gave them the invoice, and Nico keeps telling me he doesn't understand why they haven't paid me, then he says he gave the invoice to the wrong department, now he doesn't answer the phone, the office doesn't respond at all, don't do business with them unless you enjoy being ******.