Rcs doesnt want to send update to credit bureau after account was paid up in October 2019

hi . i open RCS CTM account in 2018 the same year i was retrenched , i couldnt pay my account as i didnt have an income , in June 2019 i found a new job and start to pay my outstanding debts , on the 04/10/2020 i settled my RCS CTM account . i send them proof of payment and they send me paid up letter . i asked them to send update on my profile which was never done i send a dispute to transunion so that the default can be removed , ever since Decemeber till to date i am sending them miail everday asking them to to send a update to transunion that the account is paid up , they keep on saying that they did send it i called transunion for the last 4 months to check if there was any updates send from RCS till today Transunion doesnt pick up anything , for the last week i keep on sending thme mail to send me the following as per transunion , the date they send the mial for update , the time it was send , email address it was send from and the email address it was send too . these people can list you in 5 min but to remove it once paid takes forever