Well called into the local HSBC branch to where i work at lunchtime only to find it was a "service only" branch and they don't have any advisers who can assist - "you can use the free phone though on the wall" was the only advice on offer from the counter staff.
So i ring the online banking service - my first port of call (call centre) lasted 20 minutes before the person on the other end of the line actually understood what "taking payments twice" actually meant - got to talk to someone else who's only answer was "let me put you on hold while i speak to the maestro payment department", turns out they were no good so she came back on just to tell me that she was going to put me on hold while she spoke to someone else. They were no use so she took my number and told me someone would ring me back this evening after work with an explanation how they could approve a payment that had already been paid.
She did ring back while i was at work - but only to tell me that my account had been credited with 2 x £100 payments from "
www.pstars.com" but she still couldn't explain why they had duplicated the payment.
Got home tonight and sure enough the payments are back into my account - still no word from stars though with an explanation or assurances that it wont happen again, no phone call from the bank either

watch this space