Don't do work, inform the user that they can expect a fix in the next 7-10 days. Send a notice to the client saying services will shut down in 7 days unless the

Don't do work, inform the user that they can expect a fix in the next 7-10 days. Send a notice to the client saying services will shut down in 7 days unless the outstanding invoices are paid in full. Then close it down and if they want it back charge a setup fee.