Amazon Delays

I ordered a meta quest on december 21, it went out of stock and has not shipped yet. ETA was promised to be 12 january. in two days it will not ship especially arrive.

How long will it approximately take them to restock? it keeps going in stock and out of stock every day. does anyone have this issue rn?

Had another order everything was in stock. it got delayed a week and when it arrived i had a missing SSD. Amazon has not been great these couple of months. Same thing with my order from 2 months ago massive delay had to cancel and reorder.