Spent two hours and nearly $200 in there this past...

Spent two hours and nearly $200 in there this past Saturday (3/7) for scheduled routine maintenance. Left, drove home, put car in garage. Went out to run errands today and my tire pressure is low light came on. Of course it s Sunday and I can t reach anyone. Guess I ll be heading back first thing Monday morning which is a major inconvenience and why I scheduled a Saturday in the first place.