Incorrect discount applied

[shrn]

I received an email from TurboTax with a link for 20% discount. The linked page showed $200 as the price for Expert Full Service Self-Employed:

But when I added all of my details, the payment page showed $250 per return:

This seems like a recurring bug/issue where the discount is not or incorrectly applied, and following advice from other threads, I've completed the payment and am now trying to get a refund for the additional amount charged to me.