I cant recover my password need appointment of service center

Sorry, but no one here, nor Apple can assist you with recovering your iPhone's passcode. You either know it, or you will have to restore your phone in order to regain access to it.

Ref: If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support

Which passcode? Log in passcode: https://support.apple.com/en-us/HT204306. Apple ID passcode: https://support.apple.com/en-us/HT201487