Added font with code but it does not update font on Shop Page

I have created a website and uploaded a font "COTTA" and inserted it as the header for all 4 headings. It worked all throughout the website EXCEPT on the Shop page and within the Item in the shop. There it is still showing up as the heading font the website came with. 

How can I make it so all headings in the shop also have COTTA font?

Any help is much appreciated!!

Thanks,

Jamie

Image 1: COTTA font as heading on home page
Image 2: Old font from template on shop page
Image 3: Current code

Try this code instead (replace Line 9 - 12 with this code)

h1, h2, h3, h4 {
font-family: 'Cotta Free' !important;
}