How to request an increase in the QPS limit for the Apple Transaction Info API

We use the Transaction Info API for Apple Pay verification, but due to a surge in player payment requests during major game version updates, we've encountered a large backlog of orders and are unable to process all verifications in time. We're wondering if anyone knows the process for requesting an increase in the QPS limit? QAQ

How to request an increase in the QPS limit for the Apple Transaction Info API
 
 
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