I think ASUS products legal purchased in PC store have international warranty.
You should write directly to main office in Tai Pai and to explain them that you have fault products ready to RMA.
Did Poland have main distributor for ASUS or ASUS office there or office for that region?
Their duty is to help you, that's law, nothing else.
Next time only buy from bigg stores. You are in EU and you could order from Germany or other places who take care better for customers. You will not pay custom taxes.
Stay away for small stores.
But many people make problem to self because they don't want to pay shipping 20 euro and than buy hardware strictly in their countries and on that way only make more problems to seld.
Because of that people in Serbia are ready to sit 30-40 days and spend hours on phone, hundreds of mails,
frustration,...
Because they don't want to pay international shipping and to wait replacement after 10 working days to arrive.
Example imagine EVGA, when something not work you could write directly to technical support or on forum.
They will recommend few things until they recognize advanced users and until you explain that really no solution and nothing help.
Usually everything finish from 1-24h... In that period you get link to start RMA request...
There you write shortly what happen and they send you
RMA number and describe how to send package.
You use package and send fault hardware to them. For max 20 days replacement arrive. Because process usually last 10 working days and when they send package arrive for 2 days usually.
Example sending from Serbia to Munich Germany for 1-2kg is about 20 euro. Package arrive with plane usually for 3 days and you have tracking number. That's national post service, better to everybody use that than Fedex, DHL, UPS, in some countries they as more than 100 euro.
And that's whole problem... They could recommend you try this, try that until you explain that you have experience long time with computer. Or if you explain that immediately what you tried they will ask you nothing any more immediately send link for RMA request.
Once they made mistake and didn't mark package nicely and my custom ask for me to pay 30-35 euro...
One morning I still sleep, phone start to ring...technical support from Germany call me on phone and request to UPS Serbia send them my bill and they will pay my custom tax.
That was not their duty, at the end I say I will pay I don't ask that from you... No they paid around 35 euro and my package get priority and arrive much faster than others, because other people wait 30-40 days package, one month stay package on Serbian custom. If you buy something that travel few days but custom keep one month.
In USA situation is 10 times better, we are even discriminated in Europe compare to USA. There when someone describe problem on forum, after 2h 2-3 employers are there immediately to advice what to do and to send as RMA.
And they get new for 5 days.
ASUS will have much more customer if start similar to treat customers.
With their good products and similar support they could make more profit.
Now become more and more common when ASUS present new hardware people check everything and comment
Yes it's good but I can't buy... what if something not work... I can't fight with technical support.
And they decide to buy inferior products. Last 2 years that become common.
Such excuse become common. People are not aware that with GIGABYTE, MSI situation is similar, very.