Lowe's – Rust-oleum, universal advanced formula, hammered, paint & primer in one, black

A couple of weeks ago I bought spray paint at Lowe’s Rapid City, SD. But when I used it at home it was gray! So when I was in Rapid City I attempted to return/exchange it. However I threw away receipt as I didn’t think I would need it (never had problems with spray paint at other store such as Walmart). My attempts were in vain as I asked the clerk to spray it and see and I had pictures. I was told that the only way she could help me was that I “ have to replace it with the same exact one, perhaps it was a bad mix or something”. There was none left on shelf so I grabbed same brand, not hammered, black and clerk refused to let me exchange this with the bad paint. I told her that I’ve spent much money in this store she could look me up with my phone number, she said she couldn’t find me. This is ridiculous that I wasn’t allowed to exchange it. Driving from Spearfish to their store, why would I lie that I did indeed purchase the paint there? I provided a video with pictures as proof that gray paint came out can labeled black.