Incompetence and unprofessional customer service

I have called Vodacom 2 months ago and asked for them to cancel my R65 contract and to no avail it has not been canceled and they are still debiting my account. The most annoying thing is the call Centre agent who called my residence and spoke to mom confirming my cancellation, now here's the thing my mom is not the account holder for them to confirm anything, they have my new cell number *** and still have the audacity to call my land-line and talk to my mom. It is because of vodacoms unprofessional service and call Centre agents that try to force products and upgrades on you that I have canceled my previous contracts with them and have taken my business to another service provider. I demand this issue be resolved by capable, professional and competent, as I am sick anf tired of vodacoms customer *********** customer service.