Invisible phone number in header site GridMarket

Invisible phone number in header site GridMarket:

iPad, Chrome – http://screencast.com/t/NSBWJlQgaG

iPad, Safari – http://screencast.com/t/s2GdkQ6Q

iMac – http://screencast.com/t/ujmCactw369I

GridMarket Theme Options, Header Ad

http://screencast.com/t/YmYyGYoY2x

Please, why?

Thank you,

Denis