Bad service

My telkom mobile account was due on the 28th of February and unfortunately that was on a Saturday. I then made payment on the Tuesday as I was waiting for my funds. Telkom then went and updated the status of the account by the credit bureau as 30 days late. How can they do that if the account is only 3 days late. This is really bad from them. When I call there seems to be no one that can assist with my query.