FAILURE TO MOVE CONTRACT SIM TO PREPAID

After struggling for two days to get through to the cancelations department, I was finally able to request (28/01/16) that my month to month contract sim to be moved to prepaid. I was told that the LAST DAY that my sim will be on contract was Saturday (30/01/16) and my LAST DEBIT will be on that same day (30/01/16).<br> <br> I was told that I need to put my phone off for 24hours from Sunday morning (31/01/16) 06:00am to Monday (01/02/16) 06:00am to complete the process, I switched it off as instructed. Monday morning I switched my phone back on and it's still on the month to month contract loaded with the usual monthly minutes, sms's and data.<br> <br> Again I've tried to phone the cancelations department several times to get this sorted out but either there is no answer or the call gets cut off. I need this issue sorted and my sim moved to prepaid! Without being fully debited again for your mistake!