Rude agents trying to offer upgrade

Just received a call from what I assume is a call centre to which DSTV outsources (or maybe an in-house DSTV call centre) to try and convince me to upgrade my decoder. Spoke to the rudest agent and her manager (Akash) refused to speak to me when I asked to speak to him. I could hear her speaking to him in the background and then she cut the call when I was trying to get their names.