lost the receipt

Repair against warranty?

Check coverage here.

Check Your Service and Support Coverage - Apple Support

https://checkcoverage.apple.com/

AND

Take your device to an Apple Retail Store or Apple Authorized Service Provider, or contact Apple Support:

Apple Repair and Repair Status Check - Official Apple Support

https://support.apple.com/repair

Apple Authorized Service Provider

https://locate.apple.com › Home › Find Locations

Find Locations - Location Selector - Apple

https://locate.apple.com › Find Locations

Contact Apple for support and service - Apple Support

https://support.apple.com/en-us/HT201232

You don't need the box either. Just the phone.

Make an appointment at the genius bar of your local Apple Store.

Note that accidental damage is not covered by the warranty, and it can only be serviced in the US.

You don't need the receipt to get it serviced in the US. If you're outside of the US, you can't get it serviced with or without the receipt at all.

See this, iPhone X Display Module Replacement Program for Touch Issues - Apple Support