Is there an expiry period for my account balance?

ZONE Telecom > Consumer > 1511EXPRESS
Any bonus credits that we give will expire within 180 days from date of service activation or bonus issue.
Any amount charged to your credit card will have an expiry period of 180 days. Once your account balance reaches $5, your account will either be automatically topped up or manually topped up to prevent service disruption.
Your new account balance will have a new expiry period of 180 days from the date of top-up.
Per terms and conditions of this service, any expired credits will not be refundable or transferable.
To re-activate your 1511EXPRESS account, please contact our Customer Care Hotline: 6259 9453 for assistance.