2015 outstanding bill, accumulating interest, 1st time contact from Telkom 2018

Good day Yesterday I received an automated voice message stating that I need to pay my account within 24 hours otherwise I will be disconnected. Today I called through to ask what that is about and i am told that I am in arrears since 2015 and most of that amount is interest. I am shocked, 3 years later you call me to pay interest that is accumulating. I will pay the account gladly for any overdue amount, but I will not pay interest of 3 years. Please look at this account and let me know urgently as the message stated that you will disconnect me. Please review your debt control policy. It should not take you three years to contact me. You will see that I pay this account every month. I tried several times to get the account e-mailed to me monthly with no success, so i pay every month. The number is ********** 185. Cell No ********** . Thank you. Jayshree Pillay