Telkom's refusal to provide proof of ownership of a pre-paid number

I am a prepaid Telkom customer who has been requesting for proof of ownership of my Telkom number for the past four months. I called the call center three different times and I was told I can only obtain proof of ownership from a Telkom branch. I went to Telkom Mall of the North (Polokwane) on Saturday the 03 March and I was told that proof of ownership of a number cannot be produced for a pre-paid number. How is it that I RICAd my number with all my details including Residential address, ID number and telephone number when purchasing the my sim card but Telkom is unable to provide me with a document confirming that I am the owner of my number?