Span visa - Family tourist visa rejected

Hi everyone,

We applied for family visit visa application for an 80-day stay (in Spain). We have an official invitation letter covering the full 80 days, but the No Objection Certificate (NOC) from my employer only approves leave for 60 days. I believe because of this the visa for all three members in the family got rejected even though we mentioned sponsor of this trip as my father.

Can I appeal by updating the dates in the application form and cover letter, or do we need to reapply from scratch for the entire family? Any advice on the best way to handle this without delaying things further would be appreciated!

Thanks in advance.