I have been trying to extend a membership that is about to expire in 3 days. I send a request through the api following the instructions on this page https://developer.apple.com/documentation/appstoreserverapi/extend_a_subscription_renewal_date
I get a 200 response with a body saying it was successful but the date is still the same both in the ExtendRenewalDateResponse and if I make a query to get the expiration of the subscription.