Recently ordered a 1000 from a company earlier this month and the bunch have already died, and been replenished from another company closer to home. Same living conditions, ZERO die offs. I'm almost 100% sure the company has a bad batch of crickets with the virus that kills the American crickets (Acheta domesticus) and with my new company they have the cautioned (
viewtopic.php?f=76&t=151023) Jamaican crickets (Gryllus assimilis) but I haven't had a single issue with die offs, or biting of my Beardie.
When received I have 150-250 dead in the egg crates, upon sorting them I found roughly 50 near death (motionless, legs twitching, or just unable to flip themselves upright from being upside-down) After sorting and placing them into their habitat I came across 100+ dead the next day, and ~50 dead day after day. I probably only had 10 solid feedings, so possibly a grant total of 300 crickets out of 1000 crickets that were active and alive enough I deemed edible for my Beardie. I will not disclose the company on an open forum, but I have sent you a PST to this regard to see what company you have used. But to me it sounds like a very similar experience to mine, so I have my hunch. If it is, a moderator said they have great customer care, but I haven't had a single e-mail response to my issue, so I'm afraid they will never have my business, or recommendation ever.
However, I would contact your supplier. Granted most DOAs are required to be reported via e-mail 1 hour after delivery, and if you were not home during the delivery, then their live guarantee is void. But most companies want you to be happy, so usually, from what I've read in reviews, they'll credit the account for the next shipment for an overcount.
[EDIT] - Wanted to add, if you have die offs are you keep your colony, if it is the virus, it will not harm your Beardie. The crickets will remain good for your Beardie to eat, as long as you're not feeding him dead crickets. I fed myself the most lively out of them all, but even those ended up dead the next day.