Wrong info sent to Credit Bureau

Vodacom sent the incorrect info to the credit bureau, I never missed a payment there was a misunderstanding after I cancelled my contract, I gave them 30 days in advance and the following month they still debited my account , I reversed the money , they then called me and expalined why I needed to pay the next month, payment was then immediately paid , but now they sent the wrong info to credit bureau which is negatively affecting my credit score , please may this be fixed ?