I've never heard of Perks at Work, but I'd think this would be categorized as an affiliate partner discount. That said, these discounts are available when the user accesses TurboTax through the partner's website. So if "Perks at Work" has a website, you'd have needed to access TurboTax THROUGH that website to receive the discount. See the info I'm linking below.
How do I get my TurboTax affiliate partner discount?
If you still want to pursue a refund of the price difference, you'd need to contact TurboTax Customer Support using the info I'm linking below. When you enter your topic, don't use the word "refund". Instead, use the words, "billing issue."
What is the TurboTax phone number?
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
