Why am I banned without a reason and the Xbox appeal method never work, I'm out of the...

Only in Forza horizon 5, I noticed it's going completely offline to a point where I can't even purchase anything that requires internet , and displaying a message that my gametag is banned,

Horizon 4 and other games are playing very well online

Thank you, in this case the best option is appeal to the ban directly with Forza support.
To do that please follow this article:

https://support.forzamotorsport.net/hc/en-us/ar...

Hi and thanks for reaching Microsoft Xbox gamer's community. My name is Josef.
I'm an Independent Advisor and a Microsoft Xbox user like you.

Hope you're doing great today despite this TEBOGOMICHAEL

Just as a friendly reminder, changing your gamertag doesn’t mean that you’re going to use a different account or that the system is going to recognize the new gamertag as a different account.

But now, going back to the main topic.
Are you able to play online without problems in other Xbox games?
Or is this happening with Forza Horizon 5 only?

Please double check that
PS: don’t share your email address or personal information. Here in the forums is not allowed

No I am banned but even back then It never gave me any option to appeal and I sent the ladder half of 8 years trying to figure out why I am banned

I dont see how i can be banned without me seeing why first. I never disrespect anyone, and would especially never do something to get my account banned. Please review it, you can not say there is no appeal when I am a paying customer.