Anyone deleted a Ning? Could use your advice

Hi, folks. I could really use your help on this.

I love Nings and have a variety of them. A couple I pay for, some have been transitioned to Pearson support. But I have one I want to get rid of and I can't find any Ning Help that addresses how to delete it - not just take it off-line.

If you know how to completely delete a Ning, could you please give me some pointers?

Cheers!