If I want to continue/discontinue the subscription for the next month, how do I subscribe/unsubscribe ?

The subscription gets auto renewed on the first of every month. In case you need to unsubscribe for the upcoming month, you need to unsubscribe before last but one day of the month, i.e if you want to unsubscribe for the month of October, you need to unsubscribe before 29th of september. In case you submit your unsubscription request on 30th of september, your subscription would end on 01st of October