Rain Debiting Twice After Cancellation

I cancelled my subscription with Rain on the 25th of January 2023, they had already debited my account. Which according to my understanding should be for the Month of Feb, as according to my knowledge with Rain you pay before you use. I reached out to the Service Provider and requested a refund and I was told no my deduction was for the month of Jan as the invoice was already issued. Which still doesn`t make sense as for Rain you pay before you use. But as if the January debited wasn`t enough they still went into my account if Feb the 25th and when I called and requested a refund I was again told its for January month and the debit is the last one. But this is not the agreement we had with Rain, and I would like a refund on my account for the two debits on my account. Because the reason I took up rain I knew it’s a pay then you use service so I don`t understand why it changed. And with all these level of incompetency how do I know for sure you won`t go into my again and tell me stupid stories.