Question juridique clé
Whether the appeal should be entered into despite non-payment of the cost advance within the extended deadline.
Solution extraite
No. Because the cost advance was not paid even within the additional deadline, the appeal could not be considered.
Motifs extraits
Under Art. 62(3) BGG and Art. 108(1)(a) BGG, failure to pay the required advance after the grace period leads to non-entry.