To recover an account linked to a social media platform, you must contact the customer support of each respective platform.
[Google Play Help]
☞ https://support.google.com/googleplay?hl=ko
[Apple Support]
☞ https://support.apple.com/ko-kr
[Facebook Help Center]
☞ https://www.facebook.com/help
[Twitter Help Center]
[Weverse Customer Support]