how to migrate to canada is there any good consultancy?

Answer 1

The only reliable information you can find will be in the Canadian government's website:
www.cic.gc.ca

There are many "immigration consultants" or immigration lawers out there, but be warned: they just want your money! They can only help to fill out forms that you can do on your own. They can not influence the government's decision of letting you enter Canada, nor can they make the immigration process any faster.

Answer 2

wwics is the best one...