Telkom are rude

This is about the third or fourth time I've had a call from Telkom, with the intention of them trying to sell me something. I'm very polite and listen to their sales pitch. As soon as I mention that I'm not interested, the call is abruptly ended; no thank you or good bye. It amazes me how friendly and polite they are when they think they are going to make a sale, but as soon as they realise that they aren't, they become rude and their true colours show. For that reason alone, I would never buy anything from Telkom; could you imagine their after sale service? Besides that, everyone I know who has ever had cell phone or land line contracts with Telkom have always had disgusting service. So from now on, if an agent calls me saying that they are from Telkom, I'll be one step ahead, and end the call first.