Hello, I need a help with header. I would like to make it sticky.

And also another thing in header – there is a button [GET A QUOTE] in right narrow, but I don’t see it on my computer, my friends see it on other computers (PC, MAC), how can I edit this button? I would like to delete it OR (if it is possible) change a title of this button and put my own URL.

And I would like to hide telephone number +800… and email [email protected] from header.

I will be very grateful for your help.