I bought a VZ VariTube Mod 510 VV/VW from Vapingzone last week and today after I refilled my tank I started to put it back on and it wouldn't tighten down. So I tried another tank and had the same issue. So I went to the store and the guy behind the counter looked at it and said that the threads are stripped, and that they wouldn't replace it because it was physical damage. I have a Aspire Nautilus tank and I have been using it on several of my other mods and have no issues. I would think that if the threads strip that easily then it would be more likely a defective product especially after only a week. Either way I won't be shopping there anymore, since the apparently don't want to back their products. So is there a way to replace the threads or repair them?