Are diet injections effective for removing excess fat or shaping the body?

I have been combining diet control and weight training for the past 6 months.

I have lost a fair amount of weight overall, but the stubborn fat just won't go away. People around me have told me that in situations like this, combining it with a light dose of diet injections might actually help break the plateau.

With so many different types of diet injection treatments available these days, I'm not sure whether I should get injections for fat breakdown or look into supplementary injections that work by suppressing appetite. If anyone has tried diet injections like me to overcome a plateau or to get rid of stubborn fat in specific areas, please share your experiences regarding the actual effects you felt, the cost, and your satisfaction after the procedure!