Upgrading my queen/trying to join an alliance

So I’m trying to upgrade my queen ant to a level seven. But it tells me I need to finish the chapter Where I kill a level one insect. I go to do that and it says I need to join an alliance I got to do that it says I need to build an alliance center, But when I go to build an alliance center it tells me I have reached my building maximum it will not allow me to build one. How do I get rid of buildings Or how do I get around this and build an alliance center Because right now I am stuck I can’t do anything. Please help

Hello There,

you need to dig to find that alliance centre.

Let me know if you find it.