Bad service, ********* Business Practice from Rain

I received the worst frustrating experience with Rain, I'm sharing this experience so I can save someone from having to deal with ********* business practice that Rain is using to exploit customers. I have taken up contract with Rain from November 2021 to Jan 2022, when I cancelled my contract in Jan, Rain confirmed my cancelation request and arranged for collection of their device which was collected, around May this year I received a call from their lawyers that I owe them, after follow ups and sending all the proof that I have, they said I only owe R499 for Jan 2022, when I pay for that money there's other invoices since Jan22 to Date which is reflecting on my profile. I'm unable to resolve the matter with them because emails are sent to unsupported mailbox and their support people cut off the calls. I will be escalating Rain to NCR, advise to consumers is to stay away from this provider if you can