Why is my account banned, I am very confused!

I have been using ChatGPT to help my development work, it is really a good helper and helped me solve a lot of problems. I have a lot of affection for this app, you can check all our communication records.
But today, I got this email:
You are receiving this email because we have identified suspicious activity on your account. In order to protect our platform, we have refunded and canceled your subscription. You will no longer have access to ChatGPT Plus service.

I was shocked. I don’t know what I did to get me banned.
Please help me recover my account: leetter.micro@gmail.com.

my account is banned too i want someone to pls contact me PLEASE here is my gmail
shaalinichoudhary@gmail.com