Globocnik, kindly explain where ATY is incorrect. The amount of money involved in the 13th month issue is a relative rounding error to the company. The crisis will pass (they always do), but in the meantime you will have justified the company's continuing disrespect for your contract and your ongoing effort to do your job to the highest standards, and allow them to diminish the value of your career. Not to mention withholding monies that you and your family rightfully earned.
The company just declared a fairly healthy profit for the year. It is completely correct to insist that proper remuneration for that year, based on your CONTRACT is paid. To not do so, and just allow more abuse to pass into the history books only ensures the rest of your career will experience more of the same. Again, this crisis will pass. That has nothing to do with insisting on being paid according to your contract.