Help getting support for Belkin SC+ Invisiglass Ultra iPhone7

On May 26 I purchased this screen cover for my iPhone 7 in-store at the Union Square store in San Francisco and had it installed there. The screen cover cracked yesterday and I visited the Apple store in Santa Barbara (visiting there this week) for help/support/replacement. They told me I needed to contact Belkin support, they couldn't help me with the return at the Apple store. So I went on to Belkin's website, and they need a model number, the receipt I have has no model number, and I never received packaging for the product as it's one of those non-retail products that they don't pull off a shelf, it comes in Apple wrapping. Anyway it just has a Part Number (HKHH2ZM/A), which doesn't show up in any searches on Belkin's website or on Apple's website. I can't figure out how to contact support on Apple's website, anyone have any thoughts? Thanks!