TransaktDocs

marketplace.unsubscribed

Recorded as a session's failureCode: Microsoft reports the purchase Unsubscribed (voided or cancelled) before it was provisioned.

Codemarketplace.unsubscribed
HTTP statusNone: a result code, recorded on a resource (for example an operation's resultCode) rather than returned as a problem response (— (result code))
ArgumentsNone (args is {})

What the portals show

The portals translate the code, never the title. The English (en-GB) message, in ICU format with the arguments as placeholders:

The purchase was cancelled in Microsoft Marketplace, so it can no longer be activated.

Handling it

Branch on code, not on title or the status alone, and log traceId. Codes are stable; new codes may appear, so fall back on the HTTP status for a code you do not know. See Handling errors and the list of codes.