How many shots of Shrink Universe do I need to see results?

Lately, I've been worried about sagging around my jawline, so I'm looking into Shurink Universe.

The number of shots varies from hospital to hospital, so I'm curious how many shots are needed to be effective.

There are options with around 300 shots and 600, and the difference is huge, so I'm having trouble deciding. Since it's my first time, I'm not sure which amount is appropriate.

I'm also curious about how much pain there is.

I'm wondering if it's okay if I apply numbing cream, or if it's very painful. I also want to know how many days the swelling lasts.

I'm planning to focus on my jawline, so it would be helpful if those of you who have had it done could let me know the number of shots and how the results were.