Kernrechtsfrage
Whether the complaint could be considered despite non-payment of the advance on costs within the extended deadline.
Extrahierter Entscheid
The complaint could not be examined because the advance on costs was not paid in time after warning of non-entry.
Extrahierte Begründung
The complainant received the initial order, ignored it, and did not collect the subsequent deadline extension; service was deemed effective and the advance remained unpaid. Non-entry followed under Art. 108 BGG.