Hello, I'm Keith and happy to help you with your question.
I would advise you to write a letter to the Tax Credit Office refuting any suggestion that you claimed child tax credits in 2007 and requesting details of the payments. This is the sort of item I would never discuss on the telephone. You should also emphasise your current claim as it may have been overlooked in the conversation between you an the HMRC official.
The address of the Tax Credit Office is:
Tax Credit Office
I do hope I have helped, but you must sort this problem out.
Thank you for your advice, I
will write a letter today,