Firstly, welcome to the forum. Please go to the introductions ection of the forum to say hello to members and tell us a little about yourself. Do you have any other pets?
Regarding your post above, I am very sorry to read about what happened. Even though the error was a genuine one, it must be upsetting for you. But there are so many delightful puppies in need of a good home in lots of shelters - so if you adopt another one, think of the love you can give and receive!
I suggest that you go a local shelter and choose another pet, then collect him/her personally. That is far more reliable.