Thanks for trying out all of the steps we've provided so far.
Can you clarify if your Facebook account is still active?
Have you disconnected your Facebook account from your Spotify account? If that's the case and your account was created through Facebook, you'll start seeing numbers instead of your name. Also, it won't be possible to reconnect your Facebook to your Spotify account.
If that's what happened, you might want to create a new account and transfer all of your saved content to it. For more info, check this article.
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