There is no evidence on that site that I ever purchased a season pass; the only subscriptions shown are iCloud and AppleTV (monthly sub).
The Season Pass is not a subscription, and will therefore not be listed among your subscriptions. (But subscription charges would be listed in your purchase history.)
I tried "View your purchase history" and the season pass doesn't show up there either. I tried going to reportaproblem.apple.com, and the only selections available were "I want a refund" "I'm reporting a scam" or "Reporting offensive, illegal, or abusive content".
Below those options at the top, you should find a list of all your previous purchases in reverse chronological order (new to old), if signed in with the matching Apple Account. Depending on your recent number of transactions with Apple, you may have to scroll down a bit. The support staff would be helped best by getting the listed Order Number (a string of probably 10 letters and digits) for that specific transaction.
You may also find a purchase confirmation email in your email archive. Then you can see the date there, which may help finding the Season Pass faster in the purchase history list, which is ordered by date.
There is also no link anywhere where I can send an email to Apple to request help.
In general, Apple doesn’t do support through email, unless THEY request that.
Contact the Apple Media Services staff - Apple Support. After optionally selecting a country, and filling in the form with a short description of your issue [“Tell us what’s happening”], you would get contact options, often by phone or sometimes through chat. You can also phone directly.