Vastu Shashtra indicates us the south east direction is best for kitchen room. But here living cum dinning room. The living room suitable place are North, North East, East North East, West South West and etc. Dinning hall's place is North North East, North East, South South East and West South West. Your flat main entrance is at south is the best direction.
To remove the Vastu dosha you should care the given following matters ( tips ) :
1. On the main door a picture god Ganesh should be fix on above the door both side.
2. In living hall your sofa should be beside the South wall. When you sit there than your face towards the North direction.
3. You should set up the door cloth on the door of kitchen and toilet.
4. In North East corner you should fix picture of Ganesh and Laxmi and pry their only.