useless call centre, missing parcels. absolute chaos

I purchased an expensive device from an online store, whom apparently prefers to use Fedex without letting their clients know. Anyway, long story short, Fedex has had my parcel since Last week, it was supposed to be a 3 day delivery, which is already over three days late. To top that off, I went to Fedex myself, because their call centre is useless and no one responds to emails. you cannot reach them.

When I got to fedex, they had me wait for 30 mins to find my parcel. then they came back to me saying they cant find my parcel, they know it was scanned in at their facility, but has since gone missing.

What the hell is going on here? Do not use this courier, whatever you do. I am going to sue them for negligence and demand an investigation into their staff members who handles these parcels. looking at other complaints, my parcel "which is expensive" is not the first to go missing from fedex. is there any sort of accountability in this company? They have one simple job, take something from point A, to point B. not *****, or lose things, or become confused along the way