I have reached the seller star badget is not shown?
It will only show on the first of the month.
You are probably seeing that you are on track for the next one, which will be issued on January 1st.
You have no badges now, which likely means that for the December badge you hadn't met the minimum order requirements in time for that one.
It looks like you may have earned the customer satisfaction badge. Did you meet all of the requirements, or just the one? And as NanaLetha indicated, you must wait for the beginning of next month to see the "Star Seller" status (provided you have met all of the other requirements). I would also caution you that "Nendoroid" is a trademark: you may need to remove that from your listings.
@HexenesselsArtDoll: Star Seller star and badges are calculated and awarded only on the first of the month using data from the previous three month period.