Will the difference in price not be refunded when downgrading from Udio Pro?

I subscribed to Udio Pro and paid $30 to try out the new features. However, after 7 days, I decided that I didn’t really need it and chose to downgrade to Udio Standard. I expected that the downgrade would occur after the one-month Udio Pro subscription period ended, but in reality, it was downgraded immediately, and my credits dropped from 4800 to 1200 all at once. To my surprise, there was no prorated refund. So, I contacted support, and it turned out that the next renewal for Udio Standard was set at $0. Additionally, on the Stripe screen, it showed ‘The estimated amount for your next payment is $4.83.’ Initially, I was worried, but in the end, I was relieved to find out that I would be refunded.