My recollection on how to port out was that you click on the email from ting, and, it tells you on the screen how to port out if you don't want to stay with Ting (no credit card required). One of the radio buttons on the very first screen says "I do not agree to the Terms of Service. I would like to port out my number." At the time, seemed pretty simple, but, i didn't follow that path as I wanted a free month.
Check your minutes/texts/data itemized billing usage on RingPlus. Nothing updated since Tuesday (yesterday) morning. That's when it migrated to Ting.
If you didn't activate with Ting via the emailed link, your line is in a Ting "holding" account. They provided a 2-3 day grace with an unspecified limited amount of usage allocation until you either accept Ting's terms and provide a CC# or port it out. If neither is done they'll suspend your service probably no later than Friday even if you didn't use up your grace allocation before then.