clutch pedal goes in with no resistance

What is your question?

I took my miata in for an oil & filter change and when I drove it off it had a consistent noise sounding like a warning noise like when you don't have your seat belt connected. Also the clutch pedal went all the way to the floor with no resistance and the clutch would not engage to shift from gear to gear.

What makes this problem better or worse?

nothing

How long has your 1996 Mazda Miata had this problem?

just since I left the oil & lube shop