I SCREWED UP BAD- HELP

Okay… so I got excited about a product that we got in at work and I posted it on our Amazon Seller account. Well it is slightly different than the product we have… the post I posted off of is a power boost version and we have the standard version.

AND

40 people placed an order within like 4 hours!! What do I do? I can’t cancel 40 orders? If I delete the listing will it cancel the orders and will that ding my account? I’m thinking I could message all 40 people tomorrow and just let them know? IDK HELP!!