They have now reverted my salary back to its "agreed upon" rate (which is around 1/3 less than what I was "erronously" enjoying) AND they are also asking me to pay for almost P600k worth of overpayments. (This includes around P200k worth of taxes that they said will be returned to me...)
Given that this mistake was not one that I made, what are my legal options? I have already asked them to reconsider decreasing my salary and making me pay for the excess payments and our HR responded that they'll discuss it but I have yet to hear anything and more importantly, my salary has already been decreased. (No deductions have been made against the past overpayments.)
Do i have any legal standing/options not to pay for the overpayment? What happens if I just resign?