don't cry. now they're happy on tamagotchi planet. you can try to get the same ones you got before.
once my friend josh brought his v5 to school, I saw the spaceship on it and I didn't know what it ment, and he told me they got taken by aliens! I was laughing the rest of the day, and I belived that!
sorry that your tamas left. you can always try again.
then if you keep trying tamagotchi will teach you to be a good parent! your tamagotchis are still happy! don't feel sad. this is just one loop on your roller coaster of life!