To contact amaysim for urgent billing and payment inquiries call 1300 808 300 or dial 567 from your amaysim mobile (free of charge) for a direct line to their call centre. The call centre is open Monday to Friday 8:00 am to 6:45 pm, Saturday to Sunday 10:00 am to 5:30 pm, public holidays 10:00 am to 6:00 pm. amaysim is not happy unless you are, and the customer phone service team is available to assist with any difficulties you may be experiencing with your amaysim service.