I'm not telling you to ignore it. I'm telling you to be more productive in how you go about dealing with this issue.
Personally I don't know how/why such downloads are bothering you. If those users are asking you for support then you just use an automated response that the game is meant for the Windows OS and there is no support for any other operating systems.
This may also be an opportunity for you to consider making a mobile (paid) version of your item and make some money off of it instead. Turn an annoyance into a profitable venture.
But hey what do I know? You'd rather sit here complaining about it instead of doing something more productive ;)
You're already using Unity and most of your games don't seem to have any gameplay that would exclude a (paid) mobile port. Might also help to offer a (Google Translated) arabic version of your store page/blurb so that those visitors actually understand what you're saying.
March 2021 EDIT: I refuse to censor or alter any of my posts just because you dislike what I have said. I have been polite and refrained from breaking any rules so you gotta clean up the mess you made by yourself.