Vodacom - Cancellation of Contract

I have all the family contracts on my name. 4 Lines and i have been with Vodacom for more than 20 years In Sept my fiance passed away an I called to get the Contract Cancelled as i was told that I do have insurance on the contract. Only to find out that the insurance only covered me and not him. I was then told that the cancellation would be quite high as the Contract would only cancel next year April, Eventually the attorneys to me i could cancel and I called Again and then was give a Cancellation Fee and process which i followed exaclty, I have since emailed Early cancellations 3 time and another escallations department, I have called twice and gone in store and sill i received another Bill, All i need to know is that the cancellation was cancelled. The store had the audacity to tell me that they know the department does not action as it means less money for them as i told them that they had no problem to sell me two contracts which they did action. The attorneys that i am dealing with for my Fiances estate has advise I should stop the debit order. I was hoping to deal this in the proper way but it seems that Vodacom is not willing to and i will be forced to follow the attorneys advise