In order to email, chat or even talk to someone at Stripe about anything to do with your account, you need to first log in to your Stripe account. Then click on the 'Help' icon the 'Help articles' on the top right of the page:
On the following page, click on Contact support on the top right of the page:
A Contact us panel will then appear on the bottom right of your screen. As soon as you have selected a topic from the list, you will be able to choose how to communicate with them.