Connection lost after partner engineer cut cables

Hi there,

This morning we had our Hub 3 installed by a lovely engineer, finally had connection for a good few hours before I noticed it dropped off. Then heard drilling outside my house. A third party engineer was doing external works (which the original engineer had established was not necessary as he sorted the hub already). This second engineer didn’t knock or let me know he was going to do any works. He just assured me that once he was done, I could restart the hub and it would work again. I said alright, I didn’t really have a choice as he’d already cut the cables. I left him to it, then shortly after noticed the van had disappeared, so tried restarting my hub. Still not working.
The new cables haven’t appeared to have been routed to my living room, but the cellar instead. So I have no idea how to reconnect the hub, and have been left with no way to contact an engineer. Tried over the phone and was promised a call back, yet to have materialised. I need an urgent appointment to sort this because I have already been waiting weeks for an install. Could anyone help me get in touch ASAP and sort a faults appointment?