How can I transfer my purchased domain to a new store?

[ArthasEdit]

I have bought a domain from one of my stores but as i couldnt do well in that store i have opened new one but when i use my domain again it is saying it is not varified. i bought redpickstore.com domain www.redpickstore.com is not working. i have access to the account & email of the domain how can i use it in another store of mine now? 

[ArthasEdit]

this is what i'm getting but i cant activate that store again as it is gonna cost me another 25$ so can you guys help me with that?