If the book didn't help, I don't want your money.
Write to jackcoleus@proton.me within 30 days of buying, from the address you paid with, and say refund. That's the whole process. You'll have it back within a few days, and I won't ask why.
Please don't reply to the receipt from Whop — it comes from an address nobody reads.
Payments are handled by Whop, who appear on your statement.