Rain debited me for a service that I cancelled

I am very disappointed, I first wanted to renew the offer I was using, was left with no option to renew and thus had to cancel, only to find I was still being debited, my billing is post billed? How is it post billed when I started the contract I had to pay to have the SIM card delivered? ********* business practices!!

If you actually looked at my profile, you can see I started using rain in April 2022, I was double billed at the start of the contract which amount to 500, if you actually looked. That was a duplicate payment, I never received credits for it to date. End of May 2022 I was billed again. So I don’t understand what you mean about post billing? When rain started providing a service to me I was billed twice!! I end my service in April only to find 27 May 2024 I’m getting billed again?? How is that a “post billing”?? I won’t be getting charged further? A month later after my cancellation I was already getting billed and you call that gif service??