Dishonesty and unpaid bills

The owner of Sunset Beach View (Sunset Beach Lodge & Spa & Cape Conference Centre) hired catering equipment and furniture from my company for a wedding on their premises at the beginning of May 2018. After countless telephone calls and resent invoices, the outstanding bills remain unpaid. On the off chance that she takes my calls, she fobs me off with feigned innocence and instructions to call a mysterious accountant at a telephone number that is not answered. Most times, she doesn't answer the phone. I would think twice before doing business with these establishments.