It depends on the variety. Some will be opening in the early Fall. Others will not open until the late Spring.

When I bougth it , they told me that will be in bloom in Fall. Should I wait 2 more months?

Fall is a vague term. It could mean until the first day of Winter, Dec 21. As long as it has buds, it will bloom. You can count on that. Don't give up. There is nothing you can do to hurry it. Be patient. Don't worry.
PB

I will wait...
But tell me how long the flowers will stay? Are they smell?
I think my camellia is most popular variety with white blooms.

Some have a slight fragrance. The blooms will last several days if left on the bush. Again, it depends on what kind it is, how healthy the bush is, amount of rain, sun, shade.

I wish I could tell you more, but there are so many different camellias and so many things affect what the blooms do.

If you would like to see some pictures with names of different ones click on either of these.

http://www.camellias-acs.com/Gallery/Gallery_A.html

http://www.eisenhut.ch/list_en.php?where=c&o=0

PB