There are A LOT of chick virtual pets, it might help if you could post some photos for what you are looking at so we can better help you :)
EDIT:
https://www.tamenagerie.com/Bwatchininst.html
You might want to check this out. I own 2 of these and they are all in Japanese.
I wouldn't worry as of now. It can take up to 1 month or even longer. If she wrote a return address, the mail will be returned to her if it fails to be delivered to you.
Always ask the other party to write his/her own address in case of failed delivery.
I don't know if it works, but I think you should open it up and try using alcohol swabs to clean the board.. It worked on some of my tamagotchi that had insensitive buttons..
Hello!
You can actually get them at Taobao.com - but there is a catch, the website is mainly in Chinese and most likely you will need to use a middleman service to buy stuff from there.
EDIT:
By the way I own one and honestly speaking I don't think you should spend on them. You'll be better...