Disillusioned

Since August when our Fibre network owner/operator had an infrastructure problem we've been experiencing multiple hours of downtime on a daily basis. A ticket was lodged with my ISP, their technicians always friendly and helpful constantly assured me they were working on it. After numerous remote tests the matter was then handed over to their escalation analysts who have escalated the matter to the FNO. They in turn said there was no problem with the line, and the ticket was closed. The problem persists and a subsequent ticket was lodged by my ISP to the FNO and still nobody has been to investigate the problem. Where does that leave me?? Frustrated and helpless.. without any answers!