Am i doing something wrong. I bough 3k pearls, and used it to buy season pass but it didnt unlock. Tried relogin but no luck....

write to support? how can we help?

You sure you bought the "Black Spirit Pass" and not the "Daily Special Pass"?

Click the "D" calendar by your minimap.  Are you able to collect the bottom row of items?  Did you get the "Choose your classic pet box" for day 1?   If so, you bought the wrong pass.

If you bought the "Black Spirit Pass" (aka season pass), it should be in your pearl inventory and you have to use it from there to activate it.

If neither of these, go into the Pearl Shop and click "Purchase History".  Scroll down to the bottom, what do you see there?  If it's there, try cancelling it.

If none of these help, submit a ticket.