Help! Upon resigning from my job it transpires that I have been paid enhanced maternity pay. However, I did not ask for the enhanced package so the error is entirely theirs and the HR rep's. And I honestly had no idea. Amount was declining and due to tax etc it is not so clear cut as to spotting it wasn't correct. I have paperwork showing my choice of basic package, and copy of the email in which I have sent the form to them. Where do I stand in relation to the repayment now demanded from me?