How long until FB email change goes through

[judet]

I'm currently a student who made their account with the student discount through facebook.

Since then, I'm still in school, but I changed my email and didn't realize all of my Spotify emails were going to my old email, including emails sent to NOTIFY ME ABOUT RENEWING MY DISCOUNT.

As a result, I unwittingly have been paying over $10 a month without realizing it for several months.

I changed my primary email on facebook and removed the old email for good measure, but my account still shows the old email as what it has on file to send notifications to. How long until the new email saves as the primary email for Spotify to reach me?