In accordance with Sun Country Cancellation Policy customers may change or cancel a reserved flight within 24 hours of the purchase. Sun Country will give you a full refund of your ticket price if you cancel your reservation at least one week prior to the departure date of your flight. Sun Country has unfettered authority to change a cancellation made within 24 hours.
https://www.travomojo.com/cancellation-policy/sun-country-cancellation-policy/