Artistic General Contracting Artistic Hospitality & Resort Construction Inc. Make online purchases but do not pay their bills! Internet

I maintain an online store and received an order from Artistic General Contracting. Utilizing a purchase order system they placed an order. Although their purchase order stated that payment would be made within 30 days they soon began a process of leading us on. When payment was requested at 49 days I received an email stating, "Your invoice is currently in our approvals process and will be eligible for our next payment on the project". I wrote again at 60 days past due and received a response which read, "We have not received payment, but are anticipating receipt in the next few days. Upon receipt your payment will be processed within 7 business days." Again, I received no payment. At more than 90 days past due I wrote once again requesting payment - I've received NO response! To date, more than 120 days since receiving their order, I continue to be ignored.