DISCOVERY WEBMASTER

I have requested that my contact number be changed twice now, still no joy. After the second request on this site I was contacted by Desiree She undertook to ensure that the webmaster change the number to which OTP numbers are sent. No-one from the webmaster contacted me though she said someone would. This was last week. By now surely the webmaster could have taken the MTN number off their records. The 073 number does not belong to me anymore. PLEASE remove it from your system. You have my 082 number. How difficult can it be to use it henceforth to ensure I actually receive OTP numbers meant for me?