Obesity+diabetes+thyroid. Weight loss,

Hi, I am 29 years of age and having a weight of 113kg , since i was 14 i started gaining a weight due to Rise in TSH level, recently i come to know that i have a rise in sugar level as well so taking medicines for both (thyroid+diabetes) , currently my thyroid level and sugar level is in control however i am not able to reduce my weight , i eat limited food and doing exercise as well , for few days it started reducing but again i gained some weight , i want the solution for such behaviour from my body , i searched for bariatic surgery but it is too costly and also not covered under insurance so would like to know if any alternate way i can reduce my weight, i am taking garcinia combogia drink as well but i rarely see any progress in Metabolism increase please suggest and guide me in a right direction towards weight loss, thanks