This has probably been said countless times already, but this game seems to be very buggy and crashes several times on my iPod Touch 5. I'm currently afraid of ever bothering to rush anything because of this bug that seems to be a common thing where the game will crash shortly after or during the rushing process.

I don't know specifics, outside of it not mattering whether the room is upgraded, or merged or anything like that. Just that sometimes when I go to rush a room. The crashing isn't ONLY on this either. sometimes I'll just crash for no apparent reason at all. I should clarify that by 'crash' i mean it dumps me back into my home screen basically.

The most annoying aspect of this is that I literally cannot keep up with my meters because 1) it resets to a previous auto-save, and 2) Since you don't gain resources whilst not actively playing my meters continue to drop below the threshholds.

Is there an actual way to fix this at all?

as far as specs on my iPod Touch here's what I could find:

Model: iPod Touch (Gen 5)

Version: 8.1

Sidenote: The App Store page says this game requires iOS 7 or later; and is compatible with iPhone, iPad and iPod Touch. It goes on to say that the game is optimized for; iPhone 5, iPhone 6 and iPhone 6 Plus. Does this mean the game is actually not suppose to work on my iPod Touch 5?

My main vault will not play have started a new one which is fine but my main vault I've spent money on keeps crashing

yep, this is the late-game wrecking ball, and support is not going to respond to the throngs. i'd say your best bet is to get on the app store purchases tab and report a problem to get your money back - you get everything from the last 90 days right back, so go do it until they sort this crap out. the time, though... gone.