When testing of sections of ZohoBooks, I created a false credit note and now I need to remove it. 

It is shown as “closed". And it has created an invoice for that credit note that is displayed as “paid”.
I tried to delete it and can’t. Please I need help to delete the credit note / invoice and continue using ZohoBooks without false information.

I removed all transfers and payments. And as a credit note, I can not find the registration of transfer to eliminate it.

Help me please!!!!! I’m stuck!
Thanks!!