TD Bank US Holding Company Credit Card Complaint

TD Bank US Holding Company Credit card department,

Late fee Massachusetts

My inquiry is what the law allows in terms of fees charged e.g. a late payment 'fee ' that is - % of the minimum payment due. Can a 'fee ' be almost equal to the principal and interest due on a revolving credit account? It seems excessive and designed to compound every month. This with Nordstrom Bank. Thank you