Bad service and *******

I canceled my rain month to month the 10th of January 2024,I cancelled on the app, deactivated my sim and cancelled them telephonically as well, followed all the protocols and expected them to debit my account for the last time the end of January… come February they debit my account for a service that wasn’t active and assured me my last payment will be the end of January!!! I even emailed them and have a reference number… this is just terrible service on their end, why would you bill someone for a service that’s been inactive for almost two month? And bear in mind this is not a subscription but a month to month thing… I gave Ample notice of my cancellation!! This is totally unacceptable and I would just want my money refunded!!