Got a response from Apple, however not helpful at all as the developer isn't responding to emails, and I can't use the "app support" option as the app won't show up (because, it's not available in my country):
-----
Thanks for contacting us.
I understand that you can’t download your purchased copy of "XXXXXXXXXXXXXXXXX" because it is no longer available on the Canadian App Store and you want a refund. I’ll do everything that I can to get your issue resolved.
After carefully reviewing your case, I’ve determined that your purchase doesn't meet the conditions for a refund. If you’d like to learn more about our refund policy, see this page:
http://www.apple.com/legal/internet-services/itunes/ww
For more information on managing your subscriptions, including how to cancel subscriptions, see this article:
http://support.apple.com/HT202039
Note: Deleting the subscription app won't stop a subscription. If you change or cancel an existing subscription you may not be able to resubscribe to the same subscription at the same price you previously paid. Your subscription will end at the next renewal date if you cancel it.
To learn more about subscriptions and purchases, see this page:
https://support.apple.com/billing
While, if you continue to have issues with content in this app, please contact the app’s developer directly, they may have more specific troubleshooting steps for their app. To learn how to contact the app's developer, see this page:
https://support.apple.com/HT207959
Note: Although we mentioned third-party products in this email, Apple doesn’t recommend or endorse these products.
I’m truly sorry that we’re unable to grant your request, and I really want to help you in any way that I can. So if you have other concerns, I’d love to give it my best. But regarding this refund request, I’m afraid Apple’s decision could not be reversed.
Hopefully, it will be a different story next time you make business with us.
In light of the current circumstances I do hope you have a good day.
Thanks,
Hithesh
Apple