Frustrated and annoyed Vodacom client!!!!

I have been a long standing customer of vodacom and I'm really annoyed at the service I'm getting now!!! Firstly there was ********** contracts taken twice in one month on my account, the ***** department apparently resolved it but only after I chased after them did I get an answer, I cancelled my debit order and refused to pay until I got my correct bill, they reversed some of the ********** bills without any explanation to what happened and after down grading my existing contract am still being billed much more than my previous contract. Every store I go refers me to call the call centre,when I do I get asked to call customer care who then refers me to ***** department and nobody can give me a proper explanation and each person gives me a different amount and unsure of what to do. Now my service has been suspended and I am getting sms offering payment options yet nobody can help me resolve this issue. What can I do, please help Vodacom is messing up my life, I'm frustrated and annoyed.