Looking at the website the 30 day money-back guarantee is for "any single course". For $1000 I can see only 3 or 4 course bundles. That's covered in the FAQ, on

Looking at the website the 30 day money-back guarantee is for "any single course". For $1000 I can see only 3 or 4 course bundles. That's covered in the FAQ, on the purchase page and https://courses.baeldung.com/p/terms#refund-policy https://courses.baeldung.com/p/terms#refund-policy "In the case multiple or combined courses were purchased, a refund can only be processed for a single course, chronologically if applicable." If you emailed them claiming the courses are only worth 10$ like you did here it can be taken as insult, not the best strategy when asking for money back.