Questão jurídica principal
Whether the appeal could be entertained despite non-payment of the court advance within the extended deadline.
Decisão extraída
The appeal could not be heard because the advance was not paid even during the grace period.
Fundamentação extraída
Under Art. 62(3) BGG and Art. 108(1)(a) BGG, failure to pay the advance after a deadline extension leads to non-entry in simplified procedure.