Rain mobile stole my money

I've been using Rain Mobile network since 2022 and decided to use a far More less expensive service provider, so I decided to terminate their services last month on the 27th of August 2024. They sent me an SMS telling me they were gonna charge me only for the SIM card but today they debited R569 which they have been deducting when I was using their services, when I call them, their consultant tells me that the reason is because I owe them R499 dated back in 2022 April which they claim I never paid, but when I check on my bank statement as well as their Rain mobile app it shows that I paid and they say they cannot see it on their system, for the past 3 days they've been also deducting R8,50 saying it's for insurance but I gave them back their router as well as their simcard and people are also complaining on tiktok cause that they are ****ming people when they leave their services and claim they owe them a certain amount of money which is not true.