Cell bad service

Hello Peter, I took a contact with Cell C finished paying it and they offered me a contracted sim card, I couldn't pay it for some time and they gave my case to Nudebt they called me and last year September if I'm not mistaken I paid all the amount I owed and I got my paid up letter only to find out that they did not clear my name and they handed me now to other lawyers DMC Management for 3 months now they have been telling me different stories not clearing my name and my credit score is *****ed because of something I paid a year a go.