If you have an issue with your payment, e.g you're not going to be able to make a payment on time or your card was stolen, please contact Zip (formerly Quadpay) directly for assistance us-support@care.zip.co
You will receive an acknowledgment immediately and a response within 24 hours.
You can also check on your plan by logging into their account at: customer.us.zip.co
Finally, you can learn more about Zip by reading Zip's FAQ: help.us.zip.co