Every service has a due date and if you have not extended your Kronos Cloud, Proto Compute or any other service time of use by covering related invoices, then service will be suspended on the 4-th day after the due date. After overdue on payment. the services' data is kept for 45 days after the due day.
You can still activate a service which is suspended, however, you will need to cover the unpaid invoice for the suspended time and / or the new billing cycle. After the 45 days, suspension term expires, service is terminated and the data of a service is lost irrecoverably.