I have 2 types of yearly subscription on my website, one at 99$ and one at 299$. I want the user to be able to upgrade/downgrade his subscription when he wants to. I've tried to use the "modify" option of Paypal but it only gives me to possibility to upgrade to 20% every 180 days which is really not what I need. I've searched the Web and all I could find was:
- it's not possible
- use the paypal payflow
- cancel and start a new subscription
The #2, I can't find any good documentation. The #3, I don't want the user to cancel and then ask him to create a new subscription. Because if he payed 99$ and after 3 months and he wants to change for the 299$ subscription, I want to be able to charge him only 9/12 of the 299$ left minus 9/12 of the 99$ that he is not suppose to pay because he is switching subscription. (299*9/12 - 99*9/12 = amount left)
Anyone has a good way to proceed? Also, most of the shared links, in the answers that I find, are not valid anymore which makes it even harder.