Vodacom no response as usual....

I left SA last year to work overseas and had a contact with Vodacom. My employer always paid that contract on my behalf once I sent them the invoices. Shortly BEFORE leaving I called Vodacom to cancel my contract which I could do, and was told to still take a R40 a month contract just to keep the number alive when I returned. However after that I stopped receiving invoices. So I figured that I was already paid up and all settled. 8 months later I turn my Phone on to check my whatsapps and FNB OTPS. To find my service suspended. I find out thats due to non payment. It is paid almost immediately, and when I contact Vodacom I get told to contact their legal department to send Proof of payment. Which I do. They do not reply within the 3 days, I do it again, they dont reply within 3 days. I do it again they reply this time, saying they received the payment but there is still an amount missing and that the number may have been deleted. I respond asking how much is still owing and to confirm why the number was deleted without anyone contacting me by email (which they have) or my overseas number (which they have) no reply. Ive now sent 6 emails with no response. I want my number back and I need to know how much is still owing so I can settle it...Also teach your staff or your systems to deal with enquiries properly and to damn well send invoices so thing can be paid!!!!