No quest completion at all on transferred character

[Nightdrakon-tichondrius]

You’ll keep your reputation for both Mech and Naz and follower level (Nazjatar), but quests will be reset, and will have to be redone.

@Matsujin-khazgoroth

I want to know if I can reverse the faction change and get a refund and just go back to how it was prior to the change/transfer.

You will have to put in a ticket to Billing, and see what they say on the matter.