How can I reach the winco LLc attention to restitution department i want to make the last 2 payments but it was missed for a couple months so who do i contact to let them know and to make sure i can send it?

Yes

If you have any reason for doubt (let's say you changed your address or your name or something, and you want to make sure your next payment will still be credited to the right account), then I'm sure the customer service desk in the store would be the place to start asking. If they can't fix it, they should at least know who to call.

Just send the next payment when you can. It's common for people to miss a payment, it's ok. Sounds like you're almost done, too. That will be a relief!