As per my knowledge, the OCM will be retired in June 2020. About your query, if you are the global admin, generally, you should receive any notification email from official to get the details about it. If you are not the admin in your organization, you can chat with them to get the details.
As we are not the billing related team, it makes sense that we have no permission to access to this kind information. Sorry about that. But you can try to contact with the team via the Uservoice channel to see if you can get the answer there.