TELKOM SPEAK TO ME!!!!!

I have been trying to downgrade the service I use on my landline from Smart Voice Unlimited to a normal line rental because I hardly use the landline at all, but want to keep it. I have been into the Telkom office at Greenstone, I have tried using the interactive website, I have tried the whats app, I have emailed time and time again to the *** and all you get is nothing, zilch, nada, niks!