Maggots in the stewing beef !!!

I bought bulk beef potjie meat from MeatWorld Gateway Centurion on Monday 25/01/2021. Paid R297.00. I got home, froze it immediately. Today 27/02/2021 I took it out of the freezer and put it into the slow cooker still frozen. An hour or so later there were hundreds maggots drifting in the water. So they had to come from the meat. I have the pictures to prove it. MeatWorld you are disgusting to say the least !!!