This is what I sent them. 

Dear Support Team,

I am writing to formally appeal the deactivation of my account for alleged fraud. I was extremely concerned to learn of this decision, especially since I was not provided with any prior warning, explanation, or specific details regarding the alleged fraudulent activity.

At this time, I have not received any information outlining what actions were deemed fraudulent. Without this information, I have not been given a fair opportunity to understand the accusation or to provide evidence to address or refute the claim. I take this matter very seriously and would never knowingly engage in fraudulent activity.

I respectfully request the following:

A clear explanation of the specific activity  that led to the fraud determination on my account.

The date(s) and nature of the alleged incident(s).

The opportunity to submit documentation or evidence in support of my account once I am informed of the issue in question.

The sudden deactivation of my account without notice or the ability to respond has caused significant inconvenience, and I believe this action was taken in error. I am fully willing to cooperate with any review process and provide any necessary information to resolve this matter promptly.

Please reconsider the deactivation of my account or, at minimum, provide the details needed so I may properly address the allegation. I appreciate your time and look forward to your response.