Nuki bridge not pairing

Hi. I’m sure it’s been mentioned before but I’m a new Nuki user, purchased a Nuki 2.0 with bridge. I can’t for the life of me pair the thing to the lock. I’ve followed the steps as stated. Keeps coming up with a message saying it needs to be in maintenance mode. Have tried ring Nuki direct but the numbers just don’t dial. Is there anyone out there that can help me please?