HiFi Corp Ruined My Kid's Birthday.

I ordered a gift for my son's birthday from HiFi Corp on the 29th. It was an online exclusive deal that promised delivery within 3-5 business days. I messaged them last week to ask where the parcel was, and received no response. I complained on their Facebook page and received a useless response that someone would be in touch. Tonight my kid is having a birthday party, and he has no gift. Thanks, HiFi Corp. I will NEVER buy anything from you again. This is utterly pathetic.