My Amazon account has just been suspended when I tried to buy Amazon V pay on Fortnite.
Now there's the following text:
Blocked account
Your account has been suspended for security reasons. Check your emails for a message with instructions on how to unlock your account.
I did not receive an email though. What should I do now?
Attention: Under no circumstances any links in emails (which may still come) used.
If, then log in directly at Amazon and look at the news.
You're a minor, right?
Amazon Pay is basically only allowed from 18J.
That could be the explanation for your suspension.
Whether you are really unlocked again is questionable.
Go on amazon.de and try to log in there. If that does not work, there's certainly a message on how you should proceed.