Delete Facebook Business Manager Account

Hey everyone.

I have somewhat of a strange question. I had an IG account connected to a facebook page as well as a facebook business account.

The IG account got blocked/deleted by Instagram due to spamming. Now I would like to delete the facebook page as well as the business account.

If I try to delete the business account it says that I still have my IG connected

Maybe you can help, I do not seem to find a way how to solve this. (I already disconnected the IG account on the Facebook page)