I tried this. Need a call plz.

Nobody in this user to user forum, can or will call you.

If you need phone support to reinstall macOS, please contact Apple support directly at one of the numbers in the following support document.

click here ➜ Contact Apple for support and service - Apple Support

Also, if you explain exactly what happens when you follow the steps in the support document you posted from, and provide the model / year of Mac you are working on, someone here, may be able to advise, and provide step by step instructions.