Raw garlic?? If it was, be very careful
You shouldn't vac pac raw garlic, I'm a chef and they (health department) say that garlic is an extreme risk for botulism! We are told that one of the biggest dangers for botch in industrial kitchens is raw garlic stored under oil in an anaerobic environment. It is common practice in industrial kitchens to puree garlic and store it with a layer of oil over the top to avoid oxidation and spoilage but if held too long bad things can happen.
If it was me, and the bags of ballooned garlic (or any food for that matter) were mine, they'd be going straight into the garbage. Vac pac bags should never EVER inflate after being vacuumed. The only way I would consider food in a ballooned bag safe is if the food was too hot when vacc'ed AND if I noticed this mistake (usually by an apprentice) right away.
Botch isn't something you wanna mess around with, look it up. Be safe brother.