Still not losing weight!

Today I ate:
porridge made with just oats, water and cocoa powder, estimated calories: 150
some salad with cucumber, iceberg lettuce, cherry tomatoes & sweet chili sauce, estimated calories: 100-120
rice, soy mince, Bolognese sauce, iceberg lettuce & cherry tomatoes, estimated calories: 135
dark chocolate, 2.5 pieces, calories: 165
diet lemonade, estimated calories: 5
total calorie intake: 570 calories
my BMR at next  goal weight: -1410
todays deficit:  -840 calories
target calories for tomorrow: 200-300
meal plan for tomorrow:
   Breakfast: 5g porridge oats, 5g cocoa powder, 100ml water = 36 calories
   lunch: todays leftovers from supper = 140 calories
   supper: 100g iceberg lettuce, 200g cucumber, 2 cherry tomatoes  = 41 calories
   snack: 1 peach = 38 calories
          total calories: 255  =) calorie deficit: -1155