No reaction to fault logging

On 15 November my business internet line went down. I reported immediately and got assurances that a technician would be allocated and the would give me feedback. It is now 27 November. I have phoned every day and I have repeatedly posted my problem on Facebook and Twitter. I phoned again this morning and still the same response: we are sorry for the inconvenience and a technician will be appointed. I gave had to let staff go home and my business is at a standstill. Please see if you can help. This is disgraceful.