Stay but no pay

<p>On 3rd July Devco SA booked in one staff person for which I sent them an invoice, then afterwards added 3 more people for two nights, so I sent an invoice for those 3. The following week they booked in the same supervisor and 3 workers for 4 nights, so I sent a third invoice, but after 2 nights they said they had an emergency and booked out but asked me to refund for 2 nights, which my invoice clearly states is not done. However I credited them 2 nights for the following week, when they came to stay. For the third week they booked and I sent a 4th invoice. They were now outstanding on 3 invoices, but only paid one. which was the 2nd invoice, in spite me calling the office andd eventually calling the manager, who again promised to pay by 31 July. I have repeatedly asked for them to pay and to send a POP, but to no avail. As a pensioner, I am the owner of a small self-catering lodge and rent the premises I run my business from, so I have to keep my cash flow in the black, I cannot affored to have bad debt. They are now not answeridng phone calls today.</p>