Poor customer service

I have had a vodacom contract with the same number for around 10+ years with Vodacom, i have never missed a payment or needed to make any payment arrangements. I recieve my salary on the the 4th of every month and i then make payment on my account, this has been happening for the last 10 years, in recent months vodacom has decided to report missed payments that effect my credit score, even though i have informed them of my salary date, when i queried it they were unable to assist me, i find it terrible and cant believe a company that big cannot accomodate their customers, anyways i know what ill be doing when my two contracts are uo for renewal, finding a new network