You don't want to give them any additional reason to flag the account and attempt to hold the money forever. Use a safe IP to access the account even though its already suspended
Calling in to add a bank account after the account ahs been limited is highly problematic. Not saying its impossible to do so if you fall on the right customer service rep - but those are few and far inbetween.
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AGED SUPER HIGH LIMIT ACCOUNTS: 10,000/$1,000,000 and 25,000/$500,000