Graduate with a Student Account

Hi all!So I graduated from Uni 2 years ago and still have a student account with Halifax. This was supposed to go after a year of graduating but nothing has happened, I still have my overdraft and never received a letter from them about this. I even went into the bank after I left Uni to tell them I had finished and ask if I needed to do anything

I'm just a little worried as i'm paying a large deposit so going into my overdraft again for the first time in a while, could they suddenly take away my overdraft? I also don't want them to turn around and say I owe them money for keeping my student account.

Has anyone else had this happen to them? Should I tell them again that im not a student or just wait for them to get in touch with me? (I should be out of the overdraft post pay day!)