@ThatPurpleCat
Bad form, but yeah they can do what they like.
I know someone who just recently, had a go at them for not paying a DD out even though the account was short of money. The DD bounced and caused her extra charges with the company she was meant to pay, a default on her account, and bank charges.
The bank said it was her fault not theirs, and she got arsey with them and said 'this is fucking ridiculous! It was only a tenner short, you COULD have paid it, you KNOW some income is coming in a few days later!' They asked her to leave the building as she was being 'abusive.'
2 days later she went to the bank, and her card and PIN didn't work when she tried to get her balance at the ATM. It was a Saturday so she had to wait til Monday to sort it out. Long story short, the bank had closed her account the day she had had the rant a them, (her savings one too with £700 in it,) told her they no longer wanted her as a customer, and sent her a cheque for what money was in the bank at the time. (Her savings in the one account, and 4 weeks child benefit in the other.)
Direct debits were due out that week, and her wages due in, and they all went to shit, as she had no bank account for anything to go out of or come into. Joining a new bank and getting all direct debits sorted out, and also all the income (child benefit, wages, tax credits etc,) took 2 weeks. She was in such a mess. Basically the banks are businesses and don't owe anyone anything. They will shut you down at the drop of a hat if they wish. With no warning.
So if you DO have a moan about it, try not to rant and wear. Just say the overdraft has been taken off and can you have it back?
Although... Can you not do without it? If you have had a windfall, do you need it now anyway?