This can be done by the person who installed it for you. They have to use the SA number they used to connect your OpenView.
Accordin to OpenView here: https://www.openview.co.za/help-faqs
If you are experiencing on-screen errors, you can clear these from your mobile phone. To do this:-
1. Dial the number on your mobile phone *120*6843*1#
2. Select option 2 to clear error codes
3. Enter your area postal code or city postal code
4. Select option 1
5. Select 1-4 depending on your error message
6. Please enter your STB number
7. Process complete. Please wait 5 - 10 minutes for the error message to be cleared.