Bad Service

I HAVE TRIED MULTIPLE TIMES TO ACCESS MYCREDITCHECK.CO.ZA AND MY CREDITEXPERT.CO.ZA BUT I AM UNABLE TO DO SO AS IVE CHANGED MY CELLPHONE NUMBER AND EMAIL ADDRESS. IT SAYS MY ID NUMBER IS REGISTERED AND SENDS OTP TO OLD DETAILS. I CALLED A COUPLE OF TIMES FOR ASSISTANCE BUT NOBODY ANSWERS THE LINE AFTER A LONG TIME OF HOLDING.