Billing my late mom yet theres a waiver

Sanda called and has since disappeared! called and completed a waiver form which was emailed to Katrine Mc Master at the end of Aug 2014 (shortly after my mom's passing).I repeatedly followed up by phone and email with no status report on the waiver(which is a benefit should the account holder pass on).In November 2014 I called again and was reassured that the Waiver has been implemented and communication will be forwarded to me. Till this very day, your *********** accounts department still send my late mom sms's and emails for her ADT account regardless of me calling and notifying them that I completed a waiver form. I called AGAIN and spoke to NKOSIYANE, MLUDA on the 11th of March 2015. I re-sent him all the information including the death certificate and other supporting documents. He promised to give me feedback, now he is not even responding to any of my emails! What kind of circus are your running? Do you realize that the run around is causing more harm and than good for us who have lost their mom and are trying to sort out her affairs?The bill is now on R3000 although your own agents said that the 12 month waiver is in place!I'm so dumbfounded and shocked by your service!