Vodacom and cellc contracts

I need the assistance, 2017 I app**** for a contract phone with Vodacom I paid what was due until the 24 months agreement ended. They called me asking if I will be renewing and I told them "No" because the contract has ended I'm no longer working. Months went and they started calling me saying I'm owing Vodacom now I have a large sum of debt that I never received services on no matter what I tell them please help. On the other hand someone opened an contract of three cellphones with Cellc on my name and cell has been calling about a debt i tried telling them I never opened that contract with them and even sent affidavits several times but I hasn't stopped the debt is rising. I need help