They just called again during the week and again just now, at 6:30pm on a Sunday afternoon. I have emailed them several times asking them to stop calling and never did get a written response back from them except for more Telemarketing calls.
I believe it's the symphony. Each year around this time they call until I eventually pick up. Today Easter Sunday they called again. Wow. I tell them each time I am a student and that's why I signed up for emails in the first place to get the cheap student day-of rush tickets. Like I could afford a season ticket!