Edgars Account Closure Nightmare!

My poor 72 year old mother have been trying to close her Edgars account for the past six months being referred from pillar to post and from branch to branch without any success. This is over and above being shocked by a massive outstanding balance on the account, the origin of which, no one can explain. In an attempt to just get the account closed, I just paid the amount at a branch in Potchefstroom (where she stays) and requested the account to be closed. I returned home (Gauteng) thinking the matter is settled and the account closed. Low and behold, a new sms arrives to her phone indicating a new outstanding balance. With no transport to the nearest branch, we remotely tried to close the account and all subscriptions that might be linked thereto formally by writing a "Close the Account/Subscription Instruction" and emailing it to Edgars Club, Edgars Insurance, Edgars CPI, Life & Funeral, Edgars VAS & Edgars Cellphone Insurance (basically every service of Edgars we are aware of). Only 1 response was received from IUA Business Solutions, Veni Naidoo, confirming that all cellphone policies are closed/cancelled. From Edgars Customer Care, RCS Group & Hollard we just received deafening silence. HONESTLY the worst service ever and having an Edgars account our biggest regret. We are at the end of our rope. How do we close this account!!!!!