Moving my website from temporary domain to domain I want

Hello,

I am almost finished at my wordpress website. I am currently using a temporary domain. So the url of my website is https://79.170.44.213/eliteprova.com/wordpress/ . How can I change the temporary domain to https://www.eliteprova.com ?

I contacted my hosting provider and told me to go to General then Settings and change both the WordPress Address (URL) or Site Address (URL). So I changed BOTH the WordPress Address (URL) or Site Address (URL) from https://79.170.44.213/eliteprova.com/wordpress/ to https://www.eliteprova.com.

After saving it I was redirected with an error:

This webpage is not available

ERR_NAME_NOT_RESOLVED

I tried going to https://www.eliteprova.com but it displays the same error. I cannot login to the wordpress https://www.eliteprova.com/wp-login

Please help me. I’m new to wordpress so I don’t really know what to do.

Thank you!