Inquiry regarding the effectiveness of V-Olelet injections for improving jawline sagging and double chin

As I age, my weight remains the same, yet fat has accumulated specifically under my chin. Now, even a slight tilt of my head causes a severe double chin to form. Whenever I look in the mirror from the front or from the side, the boundary between my jawline and neck becomes blurred, making my impression look dull and heavy, which is a major source of stress regarding my appearance. Since regular contouring injections are said to have only temporary effects, I am considering getting the V-Olelet injection at Maypure, which is said to completely destroy fat cells under the chin. I am wondering if getting V-Olelet will effectively smooth out my sagging double chin and improve my drooping jawline. I have seen many reviews mentioning a hardening sensation under the chin or severe swelling after the procedure; please let me know the typical recovery time—how many days it takes to fully return to daily life—and also recommend the number of treatments.