Terrible service from a company charging high fees DSTV

I am extremely frustrated with the service that my dad is receiving from your call centre and On Air DST. He has purchased a Ultra Decoder and we are battling with getting this thing connected. We have sent an enormous amount on calls and the calls get cut, and the agents don't even call back. He received an sms to say that an Installer will be assisting with installation, when we call DSTV ON AIR, they say that sms was sent in error. Stop trying to rob pensioners and giving them false information. He wants to cancel it now because of no assistance.