Enquiry attempts not answered

I app**** for PhD and have not received any feedback. I sent several emails since February and they have not been responded to. The call centre/switchboard is also not helpful, I have been calling endlessly and would wait on the line for over an hour for NOTHING. The phone rings for so long and only to be hung up/disconnected after an unbearable wait. Today, the 22nd of March 2024, I felt lucky when an agent finally answered but ended up being disappointed AGAIN when he referred me back to send an email to the M&D office which NEVER responds and I explained this to him -just when you was expecting him to come up with another solution, the phone went off and left me wondering if it was a deliberate hangup. What does it take or what best needs to be done to get feedback from UNISA???