Smithsonian Institute Customer Service Issues

I attempted to sign up for your gardening webinar scheduled for today, which was mentioned in the NY Times on Sunday. A few days ago, I tried to access the provided web address without success. This morning, I managed to find some information but was informed that registration had closed just before noon. I am disappointed to have missed out on joining the webinar due to the lack of easily accessible information on the starting time. Despite my efforts to contact customer support via the listed phone number, I was unable to obtain assistance.