You will find below a list of support pages to assist you with accessing your account depending on the platform you are using:
1. Steam
- Steam Account Issues Articles: https://support.steampowered.com/kb_cat.php?id=84
- Steam support: https://help.steampowered.com/en/
2. Epic Games
- Epic account support: https://www.epicgames.com/help/en-US/epic-accounts-c74
- Epic Games support: https://www.epicgames.com/help/en-US/
3. PlayStation
- PST Account Management https://support.playstation.com/s/account-management?language=en_US
- PSN support: https://support.playstation.com/s/?language=en_US
4. Xbox
- Xbox account support: https://support.xbox.com/help/account-profile/browse
- Xbox support: https://support.xbox.com/
5. Nintendo
- Nintendo account support: https://en-americas-support.nintendo.com/app/categories/detail/p/992/c/495
- Nintendo support: https://support.nintendo.com/