Can someone contact me on getting a refund my kids play my phone often and looks like they subscribed to two different things that I have been charged for

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

Can someone help me get a refund, I was charged for an app from my iPhone thru the apple store, however when I search to get. REFUND it does not show up,

I contacted the site and they said I have get the refund back from the App Store>

Any help would be appreciated.