Charging Blackberry fee for 2 years after upgrade

Just saw that we are being charged R51.75 per month for a Blackberry Internet service but we upgraded to a Samsung almost two years ago.<br> <br> I phoned MTN 808 to query and the person on the helpdesk asked me what phone we are using and when we upgraded the account. When I said to him \You should be able to tell me that"he said that his system doesn't show him that information.<br> <br> Really? MTN is a technology company and you don't have a system the shows your employees these basic account details?<br> <br> MTN"