Read here:
https://mygift.giftcardmall.com/Term...tCard/Metabank
Or a copy of TOC insert can be found in every pouch of GC if you have good vision.
Luckily I have yet to experience this with Meta GCs but IIRC AMEX GCs took about a week to drop temporary hold(s). Plan ahead and always have a back-up plan(s). You should have had another GC or your own debit card ready to go in case like this.
Lesson learned. Move on.