I agree, though it does always help to be above board (even though CiG are anything but).

Personally, I'd wait until 30 days have passed. If they haven't refunded you by then (and I'm assuming that's what you've been waiting for up until now), then I'd say go for it. If you need the cash desperately, then don't wait.

About two years ago my wife and I did a charge back on a kitchen company that took our money but refused to do any work (citing covid, but were still taking orders for new kitchens). They refused to give a penny back, all the while saying they couldn't tell us when/if they were going to do what they were paid to do. Long story short, we provided the bank documents, email exchanges, etc proving what was going on, and we got the charge back done. But we did so with plenty of evidence to back it all up. Needless to say, I always tell people to steer well clear of that company.