You can link a promo bar, ribbon, or button directly to your newsletter signup form instead of sending visitors to the top of a page. There are two ways to do this, and neither requires code changes.
Add an anchor to your existing link. This is the simplest option. Keep the link pointing at your contact page (or any page), and add the section ID to the end. The page then jumps directly to the newsletter form instead of loading at the top. The link looks like yoursite.com/contact-us/#newsletter, where #newsletter matches the ID on the section that holds the signup form. If you send support your current ribbon link, support can give you the exact URL to paste in.
Link to your Mailchimp hosted signup page. Every Mailchimp audience has a standalone form with its own URL. You can find it in your Mailchimp account under Audience > Signup Forms. This sends visitors straight to the form rather than to your website.
Dedicated landing page. If you prefer a dedicated landing page just for the newsletter, support can scope and build that for you. Let support know which direction you would like to go.