Incompentent Service

In December 2015 i settled my vodacom account and emailed proof and the premature cancellation quote to Retentions email add. as told. I called back 4 times this month to check and nothing has been done, i keep getting stories that its been escalated, my account is still active. The consultants are absolutely unprofessional and stupid. Im having no luck in finding out if my account is closed like it supposed to be. Can someone professional please assist in closing the account. My cell is *** and Ref no. is EC-0XSZ-2JQ5ER. And dont ask me to pay another cent!