Look at the documentation relating to this change. Realistically, it is unlikely that they actually fixed the rate and failed to amend the loan itself. If your loan statement states that you are on a variable rate & you are happy with this arrangement I see no need to advise the Bank. They would have a poor case in retrospectively progressing against you for any loss suffered.
Thanks for the reply. I was curious as we got our statement out and it says that we are on the variable rate, but we did sign a form saying we wanted the 3 year fixed(stupidly).
Can they come back in like 5 years if they realise the error and look for the refund?