Switched to Virgin on 22nd Dec ... Still at total loss and complaints being ignored

Having to post here as I'm at the end of my sanity.... Virgin attempted a takeover from Sky in 22nd Dec. Despite me informing them I had no cabling to my home, the takeover was authorized and I've been without broadband or phone since then. 

Engineers have visited, multiple appointments have been missed, I still have no service. I have raised complaints, which have been all marked resolved at point of submission. I have spent hours talking to call center staff who appear ignorant, lazy or just plaint stupid and don't bother to even try and understand. I was told to go and buy a dongle and send receipts to claim back from virgin.... But I have no way of supplying them to anyone as there's no email address. 

I'm in a technology job, I have spent decades switching all kids of providers and this has to be the worst experience I've ever had. Does anyone have advice on how to get Virgin to care?!