RDoc-2590 Add info about exception

Documentation/4.2/Raven.Documentation.Pages/cloud/cloud-pricing-payment-billing.markdown

@@ -164,7 +164,7 @@ cost, and the expected charge at the end of this month.
 
 ####Charging failures  
 If we fail to charge your account using the payment method you provided, we'll notify
-you and retry for 7 days. Failure to pay after that period may result in account closure.
+you and retry for 5 days. Failure to pay after that period may result in account closure.
 Here's an example of the notification sent to the owner and all cloud account managers:
 
 ![Email](images/known-payment-failure-email.png)
@@ -174,6 +174,11 @@ Here's an example of the notification sent to the owner and all cloud account ma
 ####Pay Now 
 
 The `Pay Now` button becomes visible on your Billing tab dashboard once there are any unpaid costs from previous billing cycle(s).
+
+{INFO: }
+There is one exception to this rule, on billing day (27th of the month) `Pay Now` functionality is disabled, so the button won't be visible.
+{INFO/}
+
 If you have resolved the issue associated with the charge failure (e.g., updated payment information), you can manually initiate the payment by clicking the `Pay Now` button.
 Upon clicking the `Pay Now` button, the system will process the payment for all outstanding amounts up to the end of the previous billing cycle.
 
@@ -188,7 +193,7 @@ It does not cover costs incurred in the current billing cycle.
 
 {NOTE: }
 ####Example
-If you have unpaid costs from 13/12/2023 and today is 01/03/2024, using the `Pay Now` button will bill you for the period from **13/12/2023** up to **27/02/2024**.
+If you have unpaid costs from 13/12/2023 and today is 01/03/2024, using the `Pay Now` feature will bill you for the period from **13/12/2023** up to **27/02/2024**.
 {NOTE/}
 
 ####Notifications