[US] possible facebook scam but item was sent and received. any opinions on what to do?

An elderly mother fell for a potential Facebook scam after commenting on a hair product page, providing personal information, and being billed $200 for four items. The company sent the items before payment and requested payment via check, Zelle, or Moneygram, despite the product being available cheaper on Amazon. Red flags include fake reviews, mismatched locations, and fake FDA certifications.