Cellc incorrectly handing incorrect information about their credit score

Good day I wish i can say i am suprised about cellc. My credit score was fine in February this year then suddenly when I check , cellc is advising credit bereu that I have not been paying them for the past year, I even called at experian and they advised that its because of the information cellc is providing them . I called cellc to advise them to provide the correct information as it shows i have not paid them for months and they say they will resolve it nothing has been done for cellc to provide the correct information , it hurts to find that they always mess things up and dont care what happens to anyone. They all lie and when you call their call center they hang up calls again and again and team leaders , i spoke to lerato and promised to call me and never did and thats a team leader. I spoke to siphiwe in randburg team leader said its resolved and nothing has been resolved , i call and spoke to kutlwano Zungu today who refused to put his manager on the line said the other 2 managers didnt escalate the matter , he will do it on his side . Cellc always says managers are in a meeting thats weird though hey . Their social midea crew lies everytime that they wil follow up yet they never do. I was given info by experian to contact the ombardsman , imagine a 3rd party is willing to help yet cellc always takes no accountability.By law they should send me invoices monthly yet they dont send them yet i gave them my details. cellc is the worst company by far in the world.