Never get a MRP Mobile contract

We have 2 contracts with MRPMobile that should have ended at the end of May. Emails for cancellations were sent to them in May and they sent emails back to confirm that the contracts will end on 4 June 2020 and 12 June 2020 respectively and that the sim cards will only convert to prepaid on 1 July 2020. Well, that never happened and I have been phoning repeatedly, without any results, since then. Both contracts were paid by debit order, but when I phoned again on Friday we suddenly owed more than R500 on the one account and they couldn't tell me where the owed amount came from. Please, never get a MRPMobile contract.