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I would treat this with a horticulture oil such as Neem Oil.
You also can make your own insecticides.

Here is a link that will help you.

https://www.gardeningknowhow.com/special/organic/natural-home-pesticides-organic-garden-pest-control.htm

Watering issues can cause the leaves to yellow and drop off.

Check the soil, it should be moist but never soggy.
Also look for signs of pests or disease, yellowing leaves could also be due to these issue.

https://www.gardeningknowhow.com/ornamental/flowers/jasmine/growing-jasmine-plants.htm

This link may address the issue.

https://www.gardeningknowhow.com/ornamental/flowers/jasmine/jasmine-has-white-spots.htm

Maybe you have overwatered it. I saw jasmine plants growing in California, and while they were in gardens that people watered, I think they can survive well with out a lot of water. Bring it back to the nursery where you got it and ask them. I have had plants that I overwatered, and when i let them dry out, they all of a sudden revived. Then i only watered them lightly. Or let them dry out in between.
Good luck!

If the plant is already in a container with soil around its roots, it should do fine planted in the ground. Water it the day before you transplant so the soil will hold together better. Plants in the ground survive winter much better than plants in containers. You could also consider protecting it this winter with mulch:

https://www.gardeningknowhow.com/garden-how-to/mulch/mulching-plants-in-winter.htm

This type of bud forcing is not possible.
Here is a link with more information.
https://www.gardeningknowhow.com/ornamental/flowers/jasmine/non-flowering-jasmine.htm