You also just gave them your recorded voice saying 'yes'. They can now use this recording as authorization for a credit card charge over the phone. NEVER say 'yes' for any reason to a caller you are not familiar with!
This company has called me at least 30 times in the last 45 days. Several calls per day. I too called the number back and pressed "1" to be on their do not call list. I have talked to a live agent and told them I don't own the vehicle, yet the jerks keep calling.