My button background color will not change

Please, I need help urgently!

I had somehow made my "Get a free estimate" button as the default button style and that has been the beginning of my troubles.

I have tried to change this my other buttons; "Request service" and "View service" back to their initial style but to no avail.

It changes correctly when I edit on the page builder, but still the same when I load my website online as seen on the attachment.
Please help me.