I accidently hit the temp. rating too low on my fridge causing many things to freeze, such as my Wyeast 1214 Belgian Abbey. Is this gonna be a problem?
You may have killed it, the issue is that ice crystals break the cell wall.
Some of the yeast may have frozen in a way that didn't compromise the cell so it is worth making a starter and seeing if you can get it to ferment though.
If so you can just cold crash it, remove some of the liquid and store it in a sterilized mason jar for months.