Coursera denied my refund after upgrading to Plus - is this fair?

I just had a frustrating experience with Coursera's refund policy and wanted to vent/share to see if anyone else has dealt with this or has advice.

I enrolled in the Google Data Analytics Certificate for the first time, choosing the 7-day trial + monthly plan at $29. My first payment didn't hit until today. Right after paying, I saw a promo for Coursera Plus annual and upgraded. I reached out to chat support right away to get a refund on that $29 monthly charge, figuring it was redundant now. But they denied it, saying I needed to cancel before the "trial" period ended. They said upgrades have a 7-day refund window. Has anyone successfully gotten a refund in a similar spot?

Appreciate any tips or similar stories. I don't really know what to do now.