Any way to reverse in-game purchase?

I think I've heard of players having their account state reset to a certain date. Might be remembering that wrong. This would reset everything though including any progress you've made farming shards or whatnot since then but you'd get your crystals back. It might be worth asking ea help about it if you value the 2000 crystals more than the days of progress (including crystals from payouts) you'd lose by reseting your account.

Of course, they might not have the capability. It all depends on whether they backup account states and how long they maintain the backups.