Hi friend,
Welcome to Health Care Magic
Your BMI is more than 35 – OBESE
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Weight is like bank account / The amount in your account comes down when you withdraw more (physical work) and you deposit less (eat less).   If the weight is picking up, it only means – the exercise is not enough / the food is more / or both.... 
See a good dietician - you have to reduce the quantity of your food and change the quality too.  You need regular exercise.   
You have to aim for slow and steady reduction – Up to 2 KG in a week, is generally safe.
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                You have to reduce the QUANTITY of your food and change the QUALITY too.  It is not possible to explain or understand the nuances on a single occasion.  To start with, reduce the amount to one third of what you are presently taking.  Avoid all fats – they have double the energy of carbohydrates.   You should see a good DIETICIAN - One generally needs SEVERAL sessions, to master concepts of calories, nutritional values, biological value, 
vitamins, minerals and so on.
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     Exercise helps   But you need to do really severe and prolonged exercise – several hours. Start half an hour a day and slowly step up every week.  Its role is however is limited. For example, in walking 1 kilometre, one spends 1 Calorie per kilogram of his body weight!  A cup of rice or an average bar of chocolate has approximately 200 calories.  A treadmill may help.  The ideal solution is to get yourself enrolled in a Gym and have a supervised program.
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You need to watch your sugar while on the regieme – 
Hypoglycemia (low sugar) is a threat
Discuss with your Internist...
Take care
Wishing speedy recovery
God bless
Good luck