Telkom incompetence

I have fiber connection with uncapped internet. There was a problem with the fiber lines and about 3 technicians came to my house to try and fix the problem and eventually did. There was for 3 weeks no service but Telkom still charges me the full monthly amount. When *****ing them they say that I have to provide them with a reference sms that they have sent to me than they will look into the matter. I deleted all the sms'e so my question is why don't Telkom have logs for the wotk that their technicians are doing why must I supply them with their references sent to me.......Matter still not dissolved ant every one that I speak to at Telkom just pass the bug or pull up their shoulders.