You are going about this all wrong, you are eating ridiculously.
Have three or four SMALL meals spread out through the day, here's an example of something I've eaten on a day when I was watching my meals.
One weetabix with milk and a banana
Small baked potato with tuna and salad
Some wholegrain crackers with a light spread
Grilled chicken breast with lots of steamed vegetables
That is not many calories at all, probably equal to what you had today if you don't have huge portions. You can't lose weight if you are starving, your body will go into fat conservation mode. You need to eat regularly to stay sane.
You also need to exercise, you can't exercise with just a ready meal and some wraps in you for a whole day. Eat an apple after exercising if you are hungry.
Also have a small dessert after lunch on Sundays.
You are still young and growing, it's dangerous to starve yourself.