Ekurhuleni House Plan Approval

I have given an architect a go ahead to submit a house plan for additional on my existing property. He came back with a plan stamped and signed. But I wanted to confirm if indeed it was a real stamp on the plan ,however whenever I called municipality, the consultants I speak to they seem to not even know that house plans are.

Please can I get a respond with the correct telephone number to call to verify the legitimacy of the approval because I am forever at work during the week and can't go to the offices. Please can I get telephone number where I can confirm house plan approval for Tembisa in Umnonjaneni Section.