Absolutely poor taste. I sent this email to them as well.
I have a complaint about your telemarketing firm. I received a phone call at 7:15 PM today (4 January) asking me to visit your site, and the representative refused to listen when I said he had called a business line. When I then said he had called an unlisted number he said he had obtained it from a publically available database, and continued on with the spiel - despite the fact that I clearly wasn't interested, and would have interrupted him earlier had he shut up for 10 seconds. And to top it all off, when I clearly indicated I wasn't interested and the conversation was over, he continued with "please visit our website".
This is absolutely appalling behaviour, and I can assure you that I absolutely will not use your services, and will be advising others not to do so as well.