Who do I contact if i need support with my PayRewards Mastercard gift card? The Card Network (TCN) Client Services can be contacted on:Phone: 1300 375 346Email: info@thecardnetwork.com.au Related articles Ultimate gift card range: Who to contact for support Why was a transaction with my pre-paid Mastercard gift card declined? Payment processing timelines How to get paid through pay.com.au I am having trouble paying with my Apple, Samsung, or Google mobile wallet, what should I do?