any advice please! ive tried everything.

Im 27 years old and I just had my 3rd baby a year ago. With my 1st baby I lost all the weight in 6 months. 9 months with my 2nd. I can not seem to lose the last 17lbs with my 3rd. ive tried different exercises and nothing seems to help. the only difference is that Im vegan. have been since my 2nd son was under a year old. hes 3 now. please give me any advice and exercises that have worked for you. i drink 3 liters of water a day and only 1 cup of coffee so I rarely drink sodas. the weight is mostly my love handles and thighs and stomach. i had 3 csections so I doubt that pouch will ever fully go away. thanks