Troubles with pacman and wi-fi connection

I have troubles with fresh-installed manjaro and pacman. For example: I’m trying to execute pacman -Sy and have such output:

error: failed retrieving file 'core.db' from mirrors.colocall.net : Resolving timed out after 10000 milliseconds

My wi-fi works fine, I can visit different sites with Firefox.

Help please!

pacman works fine while using wired connection (i used my phone as USB-modem).