Mecha Kobold Skin not being unlocked

Good afternoon

I pre-registered for Warcraft Rumble about six months ago, but did it in the play market, which was registered with an email address different from the one with which my main Blizzard account was registered :frowning:

Can these rewards be transferred to my current account (KuBBy #31146) on which I already have sufficient progress and have made several purchases :frowning:

I really don’t want to lose these cool skins

Thank you!