How to end a customer service call?

If you are the customer, ask for the rep's supervisor's contact number so that you may enter your comments regarding the status of the call. If it was a 'bad call' and the rep was just jerking you around, they will most likely throw fuel on the fire by immediately disconnecting. If they DO provide said contact info, just politely thank them and HANG UP. DO NOT accept 'transfer' to the supervisor.

If you are the customer service rep, ask your supervisor for 'guidance' in your 'call-closing' techniques. Use it as a 'bonding issue'.