Prosites upgrades downgrades not working

Hi,

Prosites upgrades downgrades are not working using Stripe in trial mode. Stripe webhooks and transaction records show they receive the data fine. But there is no actual change to the account. Both upgrades and downgrades. I can't launch until this is fixed! (I'm posting this again--Rupok stopped responding to my first ticket.)

Also, where in the plugin files can I edit the cancellation message? See screenshot.

Thanks,
Tom