Is the petitioner required to pay 300 pounds sterling monthly to the poor and needy as expiation for his vow, and what is the day on which this amount becomes due after repeatedly committing the sin and repeatedly making the vow in more than one form?

These vows are from the category of "vows of obstinacy and anger," and the ruling concerning them is that the one who made the vow is given a choice between fulfilling it or atoning for it. Its expiation is like the expiation for an oath. If the sin was committed before the expiration of the period, you are obligated either to fulfill the vow or to pay the expiation, along with repenting from the sin. If you choose expiation, then according to the majority of scholars, you are required to offer an expiation for each vow. However, according to some, a single expiation suffices, as there is a difference of opinion among the madhhabs regarding the overlapping of expiations.