How to change nameservers?

Hi,
I am elvis shrestha and i am 14 years old and now my blog "http://shresthaelvis.altervista.org" has grown a lot that i am getting more than 60,000 visitors per month and i wanted to make my blog look good so i bought a domain name in altervista www.techcirclez.com but i found that when i go to techcirclez.com, it takes me to http://shresthaelvis.altervista.org
And i am disappointed because i wasted my money and did not get a good domain so i want to use 000webhost now and i dont know how to change name servers...
Please help or check my post on suggestion post...

[dapeco]

Hello,

we are sorry that you need to go away. Your .altervista.org domain is in search engine and .altervista.org give you a very good boost on them.

Anyway, you can ask a nameservers change sending an email to domain[AT]altervista.com

[igtsecurity]

How do I change nameserver?

Your message wasn't delivered to igtsecurity@altervista.com because the address couldn't be found, or is unable to receive mail.

[alemoppo]

You can read your alias from control panel: "Users"->"AlterVista Data"->"Alias".

What are you trying to do?

Bye!