Docuent Sent Using Adobe Reader and Adobe Sign

I am a treasurer for a Veteran's organization where I get signatures on one document each quarter.  This is the only document I need to get done each year.  I use adobe reader fill and sign and Adobe Sign takes over and sends the document out for signatures.  I get 3 documents free each month.  It works great; however, the last time I did it, I got one of the email addresses wrong.  I started over with the document, but now I need to cancel the first document.  Adobe Sign support won't give me the time of day without an active paid account.  So how do I cancel the documnent.  One of four persons have already signed the document.