Were the gems used on VIP chests, or just normal gem chests? Because if it's the latter, the gems plus gem keys plus seals are somewhere between 2500-3000 chances at something that's 1000:1. So I think that's roughly the equivalent of flipping a coin and getting heads 5-6 times in a row, which while abnormal is not ridiculously abnormal.
Regardless of the specifics or the math, not getting what you wanted is always tough. Sorry this is the last straw for you, but good luck in the future with whatever game you end up going to.