You can see two types of messages saying that your account was blocked:
Message 1
“Your account has been blocked from using the Transfer Market on the Web and Companion apps due to breaking our rules. You can still use the Transfer Market on your platform. Check the email associated with your EA Account for more information.”
Message 2
“Your account has been blocked from using the Transfer Market due to breaking our rules Check the email associated with your EA Account for more information.”
If you get one of these messages, EA blocked accounts that break their rules from using the Transfer Market on Web and Companion Apps. They do this to give a fair experience to all players.
In the first case, you can still use the Transfer Market from your PC, PlayStation or Xbox. If you think this action is a mistake, you can email EA at lets_talk@ea.com.