Amount debited twice after cancellation to be refunded

I had rain month to month contract since February 2021. For two years I was struggling with the connection due to coverage that i overlooked when I took out the package. I then cancelled on the 27th February 2023 as I was just paying and their network was not covering my area. I did not get a correspondence until i sent a follow up email on the 28/02/2023. On the 2nd of March I received a correspondence with the following reference number:*** - MSISDN: *** 4G Cancellation and the money was already debited. Again on the 2nd of April another amount was debited. I would like to be refunded as soon as possible since I believe this is ***** and the company advertise as this being a month to month contract and when one cancel they still debit amount