im sorry for your situation but surely you would have got the idea a lot sooner that the help you were getting wasnt working.
Well 3 different companies were involved, well 4 actually. The roof came off the house to replace the hdmi cables. It was a new build 18 months ago. They are the original sparky, AV tech company, vodafone, and the service agent for the ubiquiti gear have all been working on it. They should be trusted people to solve the issue.