I am employed 4 days a week as a SENCO/Teacher in a children's centre. My contract has been 3 days/week and I was given an honorarium for an additional day, to take it up to 4 days a week. I have been in this position since May 2017. At the end of the summer term (July 18) is was told by our Head that I have been over paid since May 2018 due to a misunderstanding between HR Payroll and my previous Head, who set up the honorarium. What I have actually been paid has been 4 days a week, with an additional day's honorarium on top. It also transpired that my contract had changed, somewhere along the mix up, to 4 days a week, instead of 3. I was never consulted about this change as as far as I was aware, my contract was 3 days a week, with the honorarium for an additional day a week. I went from being employed through an agency to becoming a permanent member of staff and the salary was less so I assumed (wrongly) that the money I was getting into my bank account each month was as I would expect for 4 days / week. I have been told that this is my mistake for not checking my pay slips and that I need to pay it back within a 'reasonable time frame'. The figure is just shy of £9,000. The suggested amount I pay back is £300/month. Having my salary reduced by 20% and then having a further £300 deducted from my pay each month just isn't feasible and would leave me unable to pay my rent. I am not sure who to go to for advice with this. Please help!