Are you totally unaware of all the recent developments going on regarding Trai's new tariff regime?
Anyways, its a risk to go with even 7199 infinity pack, forget about 5999. It was history.
Even if you opt for infinity at 7199, it might get ceased on 31st Jan and they will refund the balance in your account. As of now, choose a base pack suiting your needs and recharge with 200. Wait for 1st feb.. things will be more clear by then..