I do have to admit I don't like those telemarketer but I am jealous of their spirit of handling the declines. Imagine yourself in their opinion, how can you perform ? Sales call to industry users or companies are similar. If you make 10 calls, there is one who is willing to discuss with you. Can you keep doing it ? I wish there is training camp to deal with this.
To be a trading company you need such spirit like this, especially when you start.
This is called hunting sale.