Cancel ChatGPT from my account before i get charged

Managing auto-renewing subscriptions -

If you want to cancel a subscription from Apple - Apple Support

M1 Mac mini, macOS 13.1; Watch, series 7 GPS/cellular, watchOS 9.2; iPad Pro 2nd Gen, iPadOS 16.2; iPhone 12 Pro, iOS 16.2; TV 4th Gen, tvOS 16.2; HomePods, audioOS 16.2 and Airport Express w/ Airplay 2

From the previously-referenced link:

This app has no unsubscribe option at all

As long as you don't tap that Renew button, the subscription will expire and not renew.