Go to court to tell the judge what happened and request some additional time. Most judges will agree to one extension. Do not blow off court just because you havent done what was required, as that is worse than showing up and politely asking for more time.
You can go t court and ask for an extension. When I was a deputy district attorney in Greeley the judges typically allowed you one extension. Make sure you get the hours done ASAP. You will not likely get another extension. The Leier Law Office can help if you want an attorney to appear with you to help you get the extension. Kent Leier was a deputy district attorney in Greeley at the same time I was so he knows the judges well.
As a former Distict Attorney in Greeley, I can tell you from experience that the DA's and the judges are very reluctant to grant continuances for failing to do useful public service. You may get sanctioned with more hours or a complaint to revoke your probation may be filed.
The Leier Law Office, LLC, 110 East Oak St. Ste. 220, Fort Collins, CO. Call 970-682-4581 for a free consultation. The answer above does not form an attorney client relationship and does not substitute for advice that can be obtained during an in depth initial consultation.