As far as I can find, most support contact forms ask for a phone number. However, I was able to find a number you can call on the following support page
here. You may feel free to contact sales at the following
1-844-613-7589 number. Please note that Sales is available Monday—Friday, 8 AM—8 PM ET.
Additionally, you can verify if contacting Billing would suffice instead as you have described an issue related to your free trial. You may contact Billing
here.
I hope this helps!