Promised call from supervisor and now a week later

This is insane, almost a month has gone by and the line is still faulty, last call i had was with a supervisor last week Monday 3rd August 2015. Promised call by 5th or latest morning of the 6th. Still nothing, i have existing ref and escalation number, this is insane, if my line is not fixed in the next 24 hrs i will cancel the base with yourselves and look for another solution. Contact me asap for the ref and escalation numbers. I usually have the chance to do alot of work from home and i have had to cancel this as the line is so unstable.<br> This is absolutely pathetic service and you need to resolve the terrible service one gets from agents and your teleprompt system.