If you can't find the answer to your questions using the Tumblr Help Center, you can contact Tumblr by clicking on the 'Contact Support' email icon at the bottom of the Tumblr Help Center page. You can also send Tumblr support an email using the address email@example.com. I've heard that Tumblr is quick to respond to email inquires.
What is the Tumblr contact phone number? There is no phone number Tumblr offers to the public for support. David Karp owns Tumblr as far as I know, you might try contacting him.