We are trying to get our money back from a supplier - where the payment was made in error through the bank in Feb 18. Each time we contact them they keep asking for a Trading account number. We have explained to them that we do not hold a trading account with them and the payment was made in error - we want our money back. We have provided them with our bank statement to show the payment being made to them on this particular date. Can anyone advise how to recover our money back or do we need to take this matter further to the Financial Ombudsman?. Thank You.