Help with an issue

Today I got AW rewards and instead of trading my loyalty crystal shatter for 7 star shards I mistakenly converted them to loyalty crystal shard. Can I write to support and ask them to convert them back?
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If it's the game costing you resources that I understand but players should own up to their mistakes.
Whether they will do it is up to them really
I wrote to support and they fixed it.
Is that the only 2 things we can use the Shatter on ? (in the Loyalty Store, but have to scroll all the way to bottom of that Store's items)
* Towards LOYALTY CRYSTAL “Shards” (“Shards” in a different sense than normal, because then takes only 15 (?) shards to buy a Whole Loyalty Crystal, and from in same Loyalty Store as opposed to over in Crystals Tab)
* Or towards 7* Crystal Shards.
Note, takes 15 Shatter to get either one, the full 7* pool crystal, vs the 6-champ pool for Loyalty crystal.
Is it ok to spend the “Shatter” soon as we get them each War season ? So there won't be anything further where holding onto a certain higher amount of Shatter will be needed later ?