Bad inefficient service from Vodacom

I have been trying for the past 2 weeks to cancel a line on a cell phone contract that is either due for upgrade or cancellation. Due to the inefficiency and a human error from Vodacom side I have been unable to do so. I have spent everyday on the phone calling Vodacom, been into the Rosebank branch, spent 2.5 hours at Vodaworld and my problem is still not resolved. I have been made false promises by call centre staff of how the issue would be resolved but it is still ignored. I have copies of emails that have been sent but once again still have been blatantly ignored. I have asked to speak to a manager and a supervisor and was told "No - they cant help with your issue". There is a complete breakdown in communication between the accounts, collections, general enquiries and retentions department. Should this not be resolved by the end of today I will be contacting the ombudsman and taking this further on all forms of social media.