Netflix valid for only one day for one week?

I got about 3 months ago Netflix with a coupon card. This would actually have been used up for a week now. Since then I have already received the message "Your gift is still valid for 1 day". Now I really should not be able to watch movies anymore, but it still works. Now my concern is that if I can pay again is deducted more than usual, since I see the account already a week "see black". Have you ever had that?

More than 1 month consumption? That's unlikely.