Debit of my account after months of cancellation and no reply from Rain.

I have been a Rain customer for quite a few years, but decided to cancel the 5G contract due to poor signal strength and dropping of the connection. I cancelled my service via the Rain app and got a notification that i had to pay a notice month and that Rain will arrange for the 5G router to be collected. After the cancellation Rain kept on deducting the full amount each month for months now. Each time I log a call i get a reference number and then nothing happens. This is borderline ******** what they are doing, and keep on doing every month.