No. The only people who can set up calls with Atlassian are Trello Enterprise customers, and even they, to my knowledge, don't have a phone number to call. They have to request a call from Atlassian.
You can try contacting them at support@trello.com or using this contact form. You may have to create an account to use the form.
What's the issue you're facing? Maybe we can help here. This forum is made up of some Atlassian employees, but mostly volunteers.
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