Please, ping me if you know.

Thanks ^^

There is no way to take pets out of resort not as far as I know anyway.

Your pets are in the resort for a certain amount of time (the time you choose when putting them in). One that time has ran out, you'll get a message that they left if you asked to. But they'll leave at some point, automatically.

Thank you for the answer :)

I guess I will yhave to wait 13 more days to get the black candy bar achievement x.x

They will automatically be released.