I really want a sharp jawline what treatment would help me achieve this? (Photos)

Both Kybella or neck liposuction are good options and will improve the double chin. It depends on your lifestyle and personality which would be better for you. 
Kybella is best for patients that:
1)  Do not want surgery 
2)  Are not surgical candidates 
3)  Not willing to wear a compression dressing around the face for 1 week 
4)  Patient-  The results of Kybella will take months
Kybella take 1-3 treatments every 6 weeks.  Patient will develop swelling and possible bruising after each injection that may last a few days.  The benefit of Kybella is each treatment is quick and completed in the office. However, some patients need more than one treatment to get desired results. 
Neck Liposuction is best for patients that:
1)  Want a single treatment 
2)  One recovery time-  Downtime for neck liposuction require wearing a wrap around face for 1 week. 3)  Less painful 
4)  Quicker results 
5)  Cost is a concern
Neck liposuction is a quick surgical procedure that can be complete while the patient is awake.  It cost around the same price a Kybella and can be less in patients with heavier necks.  The single recovery of neck liposuction may be a better option for some patients.
I hope this helps.

Thank you for your question. A combination of Kybella, Botox, and threading can help to slim and contour your jawline. Kybella eliminates fat. Injecting Botox into a muscle causes it to relax and shrink in size. When we apply it to the masseter (chewing muscle), it causes the muscle to become smaller and therefore results in a thinner facial appearance. Finally, PDO threads are inserted under the skin. When these threads are pulled, they tighten the skin from within, resulting in an instant lift.'
A combination or one or two of these treatments can help enhance your jawline.