how can I get a redund

Deleting an app won't unsubscribe you, because subscription is associated with an Apple ID and not the app on the device.

Learn here how to cancel the subscriptions you do not need here:

View, change, or cancel your subscriptions - Apple Support

Request a refund here:

https://reportaproblem.apple.com

Deleting apps its not enough. You need to cancel their subscriptions:--> View, change, or cancel your subscriptions - Apple Support

If you think you're eligible for a refund, follow these steps:--> Request a refund for an App Store or iTunes Store purchase - Apple Support

If you get no help, contact iTunes Store Support and explain your problem, filling out and submitting this form: iTunes Store – Contact Us – Apple Support

Regards

Giulio