Sure, but you can't do it yourself. You need to contact the sponsor, and they can disable, or delete your account.
If it's a smart sponsor, they will first ask why you want to delete your account and try to make things work for you again.
If they do not respond yeah just take off all links.
Looking for a new sponsor? Hit me up if you see potential in
www.Revenuecash.com. See my siggy please.