Oil Can Henry's

I went to Oil Can Henry's for a oil change in April They replaced (2) air filters and changed oil
Less than a week later, I had warning lights flash on dash board of my car stating that it required immediate attention I took it to a Toyota dealer to see what the problem was and they informed me that they found my "Engine oil levels were extremely low" My vehicle is less than four years old, lucky for me the car's computer sensor caught it in time before any serious damage was doneToyota Service department topped off oil to the correct level and resolved issueI tried to contact the owner to share my experience and concern, but was informed that he was not availableThe individual I talked to informed me that he rarely sees the owner, that he owns other Oil Can Henry's and that he is always on vacation