motion for default judgment

You can check the service process of your state to confirm if you were served properly or not. Depending on that you can get the judgement vacated on the ground of improper serving. But if you were served properly but didn't file the answer then it would be difficult to avoid the consequences of a default judgement.

To my knowledge, you cannot "refuse" service. If they ID you, they can drop it at your feet or toss it to you. You are served. Just did some googling and in some states, it is a misdemeanor to purposely evade being served. In some states they can serve you by mail or by publication.

You either gotta go to court or they get their judgment.

i wasn't home. i help take care of my parents and am in and out of the house a lot during the week.

You dont need to be served personally. Generally being served only requires that an adult living at that address be identified. You have been served...you need to deal with it.