I cannot change DNS / Records information. How do I do that?

I cannot change DNS / Records information. How do I do that?

Hello, everybody!

Thank you for the atention.

I know how to do it but when I log into my registrar website (Registro.BR) and click on my website it shows on DNS field:

"MASTER: NS01.000WEBHOST.COM
SLAVE 1: NS02.000WEBHOST.COM"

I need to clear that to input records information but there is no record information to my hosting provider (000webhost), there is only Master and Slave info.

I can clear Master and Slave information to input Zoho Mail MX records but then I would be with no website because 000webhost work only with Master and Slave for free accounts.

Is there anybody to help me, please?

I have already tried many things and searched a lot. Maybe there are record information for 000webhost but I couldn't find it and their support simply doesn't work.

Thank you a lot, guys!