How do i contact planet organic customer service? For customer enquiries and support, please email [email protected]. Our team monitor this inbox from 9am – 6pm Monday through Saturday, 9am - 5pm on Sundays.How do i contact horizon organic? Thanks for contacting us. We appreciate your outreach and will respond to your question or concern as quickly as possible (within 2 business days). To speak with someone live at Horizon Organic, please call our toll-free number at: 1-800-441-3321 Mon – Fri 8:00 AM – 5:00 PM Central.