Long duration BSNL recharge not working

Though BSNL is offering long duration prepaid recharge for data , the quality of the service is not very reliable for long duration recharge of 90 days
It is not clear whether the problem is because they have changed the scheme , or some other problem.
So for a short term review , periodically various recharges are being checked
The free voice calls also were not working for the Rs 429 scheme when tested