Whether the appeal had to be entered into despite non-payment of the requested advance on costs.
No; the appellant did not pay the fee advance within the additional deadline, so the appeal could not be heard.
Under Art. 98 CPC the court may require an advance up to the presumed judicial costs. Under Art. 101(3) CPC, if the advance is not paid by the expiry of the additional deadline, the court does not enter into the matter.