visitor visa extension online

[xbobdan]

hello friends

i need to apply for visitor visa extension and i assumed that doing it online is easy and convenient. but i just cannot figure out how to extend visitor visa online! i have an account which i applied for my visitor visa there previously. but when i click the link "click here to extend your visitor visa online", it just takes me to login page, and after logging in, i don't see anything about extension. it seems all i can do is to start a new visa application.

i am totally lost here, how exactly do you apply for visitor extension online? many thanks!