So now I am stuck with coins that have no value.

What do you think I should do now?
Not much you can do here, very sorry to hear that you've faced that. Maybe it will be a relief for you to hear that you're far from being the only one in the boat.
Crypto is all about venture investments. Even top alts could seem a lot sketchy compared to major stocks.
It is a very young industry and there surely will be a lot of losses due to abandoned projects like your one.