Didn't receive proper compensation from dbd mobile and support wouldn't help

I wasn't really sure where else to vent my frustrations at, so here I am. I, like many others, received my dbd mobile compensation package, but mine came a little empty. I was under the impression at least that I'd be compensated for any money spent on the game - before and after the netease partnership. The amount I spent isn't that great, only being about $20 total, but that doesn't change the fact that I deserve the extra cells and shards. I contacted support, thinking they'd have me good to go in less than a day, but their copy/ paste response boiled down to "sorry, it was automated, we can't help. I legit have and sent them the receipts. This is basically robbing me of my deserved compensation. Where do I go from here? I'm kinda lost because their support has never screwed me over before.