My account with Vodacom was handed over to ncubeinc, I have paid off the account last year October 2020 and the account is not updated on credit bureau

My account with Vodacom was handed over to ncubeinc, I have paid off the account last year October 2020 and the account is not updated on credit bureau. I tried contacting Ncube and was informed that they sent my information to Vodacom so they can update. I tried contacting Vodacom but I can't get through accounts since the number was blacklisted. Now I have no one to assist me and my credit status can't be updated.