Constant issues. No replies on emails regarding the incorrect information to the credit bureaus

I am beyond frustrated with Teljoy. I have to write a Hellopeter review on them every month. After all the problems and discussions we agreed to a monthly installment due to certain circumstances giving rise to an outstanding payment. Majority of the reason was Teljoy not updating my bank details correctly and not updating their system with the agreements reached. Thus all of it being the fault of Teljoy. I have wasted hours of my time to get Teljoy to update their records and keep to their own arrangements. A month ago I needed to apply for credit and was declined due to Teljoy listing me as a slow payer with a 30day account. This is ridiculous and unacceptable as the problem was mainly due to Teljoy's bad service. After I realized this I contacted Teljoy and they promised to rectifiy the matter. An email was sent to the credit bureaus but according to Experian the person who sent this email was not authorized. I have sent Teljoy and this person more than 5 emails to get this sorted out and still it is not sorted out. Teljoy ruined my credit score and I have spent a lot of money on credit report and time on trying to sort this out. It is unacceptable that Teljoy negatively affected my credit score - whilst I have paid all my installments. It just does not make sense how they could have updated my credit report so easy with the negative information but I cannot seem to get the information corrected. Due to bad service received from Teljoy I lost a lot of money, time and could not get necessary credit. I will not accept this until Teljoy personally contact these credit bureaus and ensure this is sorted out. I will not accept the empty promises and lose any more money due to the incompetence of Teljoy. Teljoy is supposed to know who is authorized to update information - thus how did it happen that the wrong person sent the update? I will continue posting negative reviews until Teljoy start doing their part and rectify the harm caused to me.