Still no broadband.

I foolishly made the decision to leave sky and go with talk talk fibre as an upgrade to my broadband.
Everything was going to plan, the router came through the post and an activation date was given for the 1st of Feb.
Since then I've had not a single bit of Internet and for somebody that needs an Internet connection to fulfil their daily work needs this is a problem.
I must have spoken to talk talk over 20 times now and seem to keep going round in circles.
Open reach have been to reconnect the fibre twice, I've had an open reach engineer in my house who tells me there is nothing wrong with the line and I've had 3 replacement routers (all the same model hg633) and still no Internet.
I'm now waiting for a phone call to give me an update (although I don't hold much hope as the amount of false promises I've received from talk talk is ridiculous)
I'm not sure if anybody else has had such a frustrating problem but I know that talk talk is seriously causing me a lot of stress.
Somebody even told me if I cancelled the contract I would be charged as I'm now out of my 14 day cooling off period (cheeky *@#][!![]'#[@#]!*)

Let's see what happens when I get my phone call today.