Where did you get the 26 week penalty from? Are you in Ireland? This is an Irish site, so advice and information given is generally applicable to this country only.
People who leave work of their own accord may be disqualified from receiving Jobseeker's Benefit or Allowance for up to 9 weeks, depending on the circumstances. However no decision can be made until you make a claim. If you're unemployed, you should sign on as soon as the Local Office opens again (next Tuesday 30th Dec).
By not signing on since Sept last, you've lost potential PRSI credits as well as any payments, which may affect you in future years.