I got charged for subscriptions that I did not approve of how do I get a refund

Subscriptions don't just start themselves you know. Check with a family member or someone you loaned your phone to. It’s like someone using your phone to make a call to a foreign country. You are expected to control the use of your devices.

https://support.apple.com/en-us/HT204084

Look here, you can

• View your purchase history

• Cancel a subscription

• Request a refund

• Verify unfamiliar charges

• Add or remove a payment method

https://support.apple.com/billing