how do I cancel a watch warranty..

See instructions in: Cancel or change the payment method for your AppleCare plan - Apple Support

Get live expert assistance by contacting Customer Support by phone or chat:

• Call Apple Support at 1-800-APLCARE. 📞
• International Support. 🌐
• Contact Apple Support. 📝
• Live chat using Messages. 💬

There isn't a charge for the warranty.

If you're referring to AppleCare+, click here and follow the instructions.

If you're referring to non-Apple coverage, contact its provider.

(226821)