Very bad service

Ref no: TU*** On the 17th of January 2020 I logged a dispute with transunion and sent a paid up letter for an account that has been reflecting badly on my name. I was advised that it takes 20 working days for them to complete the dispute and in that period i can not apply for any credit. I then did a follow-up a couple of days after and i was then advised that they could not get hold of the service provider and that the account was still under investigation. I then asked the lady that was assisting me "what happens in a case where the service provider does not respond in that 20 days they then told me that the account is automatically closed. I have been following up on this dispute on a regular basis because i was also informed that the dates which the despute was lodged does not correspond with the actual date that i sent it and received confirmation on. They told me its a system error i must call again and they have escalated it. On Friday again i called which was supposed to be day 20 I spoke to a lady by the name of Mamoseki who assured me that indeed it was the last day of the dispute but the system has incorrectly allocated the date and it was a system error from their side and she was going to follow up with head office i must call again today. This morning i called and the lady that assisted cut the call on me twice. I do not have the name but Im sure the company must have records of who assisted me, i made a third attempt of calling again after my calls were being cut and i then spoke to a lady by the name of Zukiswa who also told me that the investigation is noted on their side as day 13 i told her when the dispute was logged and that its supposed to have been finalized last week Friday and i have been calling in regularly and i was told it takes 20 working days irrespective of whether they get hold of the service provider or not. She then asked me to stay on the line, us usual i was put on hold for a long time she came back and told me its still under investigation i then told her the information shes giving is not what i have been advised before regarding the time frames she then said she cannot comment on that i then requested to speak to management she put me on hold again and came back and said management is in a meeting. I also have logged disputes with the other credit bereaus regarding the same account and they have kept to their time frame of 20 working and Transunion which is believed to be the biggest credit bereau has given me the run around and terrible service for system errors on their side.