Hi Chavez1104,
You started from a great resource: Get an Apple Music student subscription
For help with switching your plan, be sure the verification steps below found in the same article were completed.
"In Settings on your iPhone, iPad, or iPod touch
- Go to Settings > [your name], then tap Subscriptions.
- Tap Apple Music Membership.
- Tap "Verify your student status." You'll be redirected to the UNiDAYS website.
- Follow the prompts to verify your eligibility. If the verification is successful, you'll automatically return to Apple Music and continue your Apple Music student subscription."
You can also check the steps here: How to switch to a different subscription plan - Apple Support. Should the issue remain, reach out to Apple Support directly to further assist.
Contact - Official Apple Support
Contact Apple for support and service - Apple Support
Best.