Remote Metering Solutions ripping their customers off

I moved out of my apartment at Tamboti@Riverside on 30 November 2020 while my meter was on a positive balance. The account was cancelled and electricity main supply plug switched off on the same day. Despite the cancellation and the main switch being off,I keep getting billing information, showing consumption. I have sent emails to iSMRt without any response. The apartment is still empty but I keep owning this company despite cancelling my account. I am currently in arrears with R153.00. The most strange thing is my meter would be switched off every time it was on a negative balance but not this time.