Pathetic service from Vodacom

I am extremely disgusted in the service I am currently receiving from Vodacom, I took a contract with them 2 years, it ended this year June I called in May to cancel the contract as i was advised that they will continue to bill me if I didn't do so, I lost the Sim card as well so switching to prepaid would not be an option. After waiting on the line for almost an hour getting cut off inbetween, I spoke to an agent who tried to convince me to switch to prepaid and pay a monthly fee for airtime only however after explaining to her that I don't have the card anymore she confirmed that my contract was cancelled. Come end of June I received a bill for airtime I immediately contacted the customer service department requesting clarity and I was advised my contract was not cancelled, I advised them of my call made in May and told them to cancel the contract as I don't have the card and I cannot be paying for something I'm not making use off, I was told it was cancelled. I have been contacting customer service ever since as every month I am receiving a bill with the amounts accumulating montly, I received a letter last month advising me that I will be handed over and this is now reflecting on my credit profile, at this point I am extremely irate as well as sick and tired of calling and wasting so much time only to be told the same old nonsense. I sent an email to customer service telling them the samething I do every month only to be told they have escalated it and will get back to me shortly. Today I received another bill amounting to over a thousand rand and yet again I make contact with them as I cannot afford to be blacklisted for the sake of an *********** service provider, I was advised I will be contacted by two different departments so I can tell them my story and they can assist me. I haven't received a call up until now, only an email giving me the numbers of those departments so I can contact them, really??? This is unacceptable, Vodacom get your act together, hopefully you will contact me now! I will never use your services again neither do I recommend you!