Welcome to the PlayStation Community guys.
Emails should be sent out to people who's accounts are suspended or banned within around 48-72 hours of the ban/suspension going into effect, if that has not happened then you need to contact Sony customer service.
Mon - Sun 6:00AM - 10:00PM Pacific
Customer Service - 1-800-345-SONY (7669)
Available Mon to Fri From 8am - 8pm PST