Not Keeping to time frame

I logged a dispute with the credit bureau’s regarding Telkom *******ly listing not only me but a lot of South Africans on the 1st January 2021. Compuscan kept to the time frame and the matter is corrected as well as Transunion, but Experian has passed the 20 days, the issue was logged on the 8th January 2021 and nothing, you can phone then no on ever picks up the phone email them does not help they do not respond or send you an new dispute form for an all ready dispute. Perhaps they working hand in hand with Telkom, of this is not resolved today the 5th February 2021 I will report you to the ombudsman. Their sister company resolved this Compuscan but not experian.