Vodacom legal and contract

I had an account with Vodacom that was closed and paid up last year Feb ,and apparently now that account is still valid and owing with Legal status. I have tried to contact them numerous times with that *** bad service line that keeps on breaking and still no assistance. I'm going to approach consumer care now this company is unreliable and full of *****. They always promise to escalate and vet issues with no feedback or solution. Very bad service for such a big company