Taking legal action for defamation against Vodacom

*********** beyond all else. I opened my Clearscore credit rating profile only to see that for the last six months according to Vodacom I have not paid my cellular phone account. I have emailed them and have contacted their customer care to advise them that I have bank records to the contrary. No help from them. I am going to take legal advise on this subject as they are effecting my very clean credit record and will tell my attorney to proceed with legal action as they are defaming my good name.