How to request the off-platform billing exception

[remy727]

Similar discussion here:

Billing Requirement 1.2 — separating App Store installs (Shopify Pricing) from preexisting SaaS customers (Stripe)

Hi Remy! Thank you so much for your answer! Is there any other way to get this approval before we re-submit the review so we can tick this by the time we do so, or the only way to get it is to post the exemption request (similar to my message above) to the testing instructions? Could you guide me where could we acquire this? I have contacted support and wrote a post here, as instructed previously.