While in Victoria an interesting area to look around and shop is Lower Johnson Street and Market Square. A lot of small independent shops and restaurants in mid 1800 brick buildings. If you walk one block further north you can go through Fan Tan alley to Chinatown. Basically one street but also small shops with some non-Chinese as well.

Previous posters have comment saying to skip Butchart Gardens on this trip which is good advice with your limited time on Victoria.
Regarding Helijet check with the hotel you are staying in as some of them have shuttle service to there. It is only a short cab ride, 2 kilometers, if you have to take one.