We paid half down, and still owe half. The job was completed Sept 16, 2020. Bad workmanship needs correcting. Construction told us to have another construction company inspect job & write a report and they work fix those items. They will not. They wanted to repair select items and when we questioned what items, no more communication from them. Why haven't they filed a lien? We don't think there is a contract, we have asked for a copy numerous times in the last year without success. In Mn do constr. companies have to give a written notice within 45 days of starting the work that they could file a lien?