Xbox Game Pass Core issue (multiplayer)

[dense gyro]

So I bought an Xbox Game Pass Core code. It redeemed without any issues and I even have a "core" symbol next to my nickname, but I cannot play multiplayer on ANY game (besides those that are free to play). Now I can't get my money back or remove the Game Pass Core only because it was redeemed with the code. I wanted to ask you guys if I can do anything to fix it. Also, if I buy another code, but this time for Multiplayer on my younger brother's Account, would we both have the option to play multiplayer on mine and his Account or not? This little guy waited a long time to buy his own Console so he could play with me, but now he's disappointed and I'm kinda poor, it's heartbreaking to look at him so I hope that I can somehow fix it. Sorry if my English is bad, but I'm from a non-english country.

[vast hearth]

Thank you for your post! Please remember the support here is not official and is handled on a volunteer basis. Once you have posted your concern here, we ask that you be patient and not spam your thread elsewhere in the server, that will slow the process down.

If your issue is regarding an account/billing issue, you will need to reach out to Xbox Support directly.

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2. What troubleshooting have you tried?

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3. Have you searched #1091756150644555946 for anyone else with your issue or researched your issue on the internet?

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[astral thicket]

Try restarting console

[dense gyro]

I did, it doesn't work for me

[astral thicket]

What country do u live in and does it support game pass?

[clear wind]

Which games are you trying to play online? Try answering some of the bot’s questions

[dense gyro]

I'm living in Poland

It does support gamepass

[dense gyro]

I tried Dying Light 1, Dying Light 2, Red Dead Redemption 2. Every time it's the same

[dense gyro]

Firstly, I'm using an Xbox Series X

[dense gyro]

And for the second one, I didn't have many options to try. My Game Pass Core just doesn't work properly. I can't do anything about it, maybe my settings are wrong, but then, why did I play online already while having Ultimate? I guess this option is not the problem

Resting my console, turning it on and off, checking if Game Pass Core should give me the Online option or not - I did not have many options, like I already said

[dense gyro]

And no, I didn't search for community support YET because I had no time. But I will, soon