How to write a dispute on a deferred intEREST BUT they charge me anyway?

To write a dispute regarding deferred interest charges that were applied incorrectly, start by clearly stating your account details and the specific charges you are disputing. Explain that you believed the interest was deferred and provide any supporting documentation, such as promotional materials or agreements that outline the terms. Request a review of the charges and ask for a correction or reversal if applicable. Finally, ensure you keep a copy of your dispute for your records.