Charge me without me using the service

Over Debit my account/Poor Service .Charge me without me using the service . I requested cancelation of my service in 25 August 2023, of which there was only a an amount of R435 remaining in which it was supposed to be deducted or alternatively I was going to paid via others services . My account accumulated to R2132.54. I not used this service at all since August 2023. How do u as Rain charge per month and better it's month to month when I started this service which I utilized for over 2 years .I want them to write off this money because I never used a single mb of it during that period up to nw . I am extremely unhappy about Rain as a service provider . Please rectify this as I would still like to continue with Rain as a wifi network of my choice .