MWB shocking service!!!

I know I am not the only person complaining about the shocking service! But we app**** to move our fibre on 15th July. After being asked to take photos of old and new and back and forth *******, we are still waiting for someone to connect us. The fibre is in at the new house and all lights are flashing and blinking waiting for a simple change of the Bnumber - as far as we've been told by the agents. We've phoned about 20 times and get passed from person to person but never get through to the correct department and then to top it off, you get cut off after being on hold for 45 minutes to an hour. What does it take for them to change a simple thing from our old Bnumber to the new Bnumber which we've given to them!!! Noone replies to emails either. The last we heard was 23 July where they wanted to make sure we were moving the correct units which we did. I work from home and am now on unpaid leave as I cannot work! This service is shocking - they were so quick to install to get a new business and our money but now service is poor and I wish I had listened to all the negative feedback about them and gone with someone else. I don't want to cancel as that I'm sure would take another 3 weeks of running around but would appreciate someone contacting us so we can get this resolved and I can get back to work!