WE INSTALLED HARDWOOD FLOORS FOR A CUSTOMER DOING A REMODEL ON THE ENTIRE HOME. WHEN WE COMPLETED THE FLOORS AND INVOICED THE CUSTOMER SHE SAID THAT THE STATE OF AZ ALLOWS HER TO HOLD 10% OF ARE PAY UNTIL THE WHOLE REMODEL IS COMPLETE. SHE STILL HAS NOT PAID AND IGNORE MY CALLS AND EMAILS. WHAT CAN I DO?