Last week I paid a cheque into my account for 50 GBP (sent in by post), a few days later a credit appeared in my current account for 500 pounds. I rang the bank and asked them what the credit was for and they told me it was for a cheque that I had just sent them by post. I explained that I think an error had been made by them and the reply was to send a secure message (online banking) informing them of this. I have since sent a additional three secure messages providing further information - sufficient I believe to allow them to follow this up with National Savings (it was a 50 quid on the PBs) and the bank still keeps on getting back to me for more info.
As far as I'm concerned - I have pointed out their mistake and provided sufficient information for them to rectify it.
Any advice?