Rude Sales Agent

I received a call from Vodacom at 13:35, the agent saying the call will not take long, and that he would like to thank me for being a loyal client. Just as I was about to end the call, he starts with his sales pitch, wanting to sell a 20gig data contract to me offering a "brand new modem". As I was about explaining that I have already signed such a data contract with another service provided, he cuts the call. He would probably claim that he had a system problem and the call was cut, but if that was the case, he could've phoned back to apologise. (Which he did not do.) If this is how Vodacom thanks their loyal clients, then they surely don't deserve my loyalty or my business. My contract is due to expire end February, and I will definitely take my longstanding contract with Vodacom to another service provider. This agent needs to be taken to task and reprimanded, as clearly he does not know how to retain Vodacom's loyal customers, and ultimately chasing them away with his unprofessional behaviour!