Poor Customer Service

I would like to be directed to the correct department that can assist with my query. I took our a contract out in August and then 2months later the phone gave problems kept switching on and off. We phoned the courier service called Ram which collected our device in October. We kept in contact with Vodacom since October only to be told they cannot find the device, bare in mind we paid them for 3months for the device until told that they cannot locate the device, we've been in contact with Vodacom only for them to tell us they investigating the matter and it's been 8months without any update on our device yet they are still trying to debit us and my name is now bad due to not paying for a device we do not have and a device they cannot locate. We have contacted them via Facebook and we keep being rubbed off, we contact them via their contact centre and we are told there's no update and that they would call us without any update. I got a call once asking me to turn off my tracking and that was all. I feel as if they ****** us and we are having for pay for something we don't even have.