Key legal question
Whether the constitutional complaint could be entertained despite non-payment of the cost advance and lack of proof of timely payment.
Extracted holding
No. Because the appellant neither paid the advance in cash nor proved timely debit/payment within the deadline, the court had to refuse entry.
Extracted reasoning
After a warning under Art. 62(3) BGG, failure to comply with the non-extendable deadline required non-entry under Art. 117 BGG in conjunction with Art. 108(1)(a) BGG.