A week later I heard nothing so called back and after 2 hours on the phone was told to wait for a call back again. I told the phone operator I wasn't happy with this because I'd already been in limbo for a week and she said she's raise my case to "urgent."
After another few days, I sent in a complaint as well as I had now had over a week no access.
It has now nearly been 3 weeks with no contact, and I still have no access to my bank account with tesco. Also I'm not sure how much longer I can take advantage of my introductory offer on my credit card on balance transfers, and am afraid this may run out before I even get access to my account. Only an email back from complaints, saying they'd seen my complaint, but no action has been taken.