RE: Actually...
"I had exactly the same thing a few months ago, and told the guy I wouldn't answer questions on an incoming call. The bloke offered me what he said was his DDI to call. How helpful. I declined and looked the number up on their website instead.
You do know that web sites can be spoofed as well? I would look it up on a paper statement. Or don't banks in the UK mail out statements?
I kept getting calls about a new credit card account. I kept ignoring them because the calling company was not the one I opened the account with (they contract with the other company), and I had no reason to believe I owed them (it was supposed to be 0% for a year). As it turned out, it was 0%, but they still wanted a payment every month (not the usual practice over here), and I hadn't sent them the first one.
Finally they sent me a letter. I called the number they left, but didn't give them any financial details. I told them I'd call back to the customer service number on my statement. He didn't understand my concern. "But you'll just get forwarded to us at collections again, until you pay the arrears."
-Chris