Appalling Practice!!

I have received sales calls from Mondo, without giving consent to be contacted to Vodacom for marketing purposes, numerous times. Over a span of three days last month they phoned me a total of 12-14 times. On Friday(November 9th, 2018), they phoned me every ten minutes, until I eventually answered the phone(after the 6th call) only to deal with an agent(who introduced herself as Koko) that simply hung up on me when I stated "I'm not interested". I have been in contact with Mondo to remove my details from their database as they have absolutely no right to even be in possession of it, and to complain, but I have not heard any response. This is terrible conduct for a telemarketer, and is absolutely unacceptable. I will never do business with such an *********** cast of amateurs. I am still waiting to speak to someone in order to voice my complaint and to find out who the agent was that spoke to me, in order for me to take formal actions, because this is absolutely ridiculous conduct. It is unacceptable for a company to phone a prospective client the amount of times that I have been phoned, for uns****ed and rude agents to be on the other end of the line, that doesn't want to accept responsibility for a laughable service!!