Rain S.A taking twice as much money in the same month.

Rain decided to double bill me on two separate days. Why? On the 15th March I paid using the alternative Pay@ method with a different bank account from the one that I have already set on the website but I was still getting messages telling me that I haven’t made payment. I called to inform the consultant about what I’m seeing on my side, she advised me to change my billing information on the website to the one I used to pay on alternative payment method. On the 16th March I decided to change the payment method and the messages stopped but then when I check my bank account another amount was taken even though I had already paid on the 15th March. I’ve called and emailed a good amount of evidence of this ordeal. I don’t want the amount to be carried over to next month I want a REFUND.