120 days

On the 12.06.2015 I receive an sms stating my account is overdue 120 days. How is it that a company as big as intercare could not communicate 120 days ago that I owe them R77.80? I called now to enquire but apparently they offline. I would like an explanation for this kind of service because their explanation is they would have sent and email which to date I have none or an sms ...which I received 120 days after the fact. What is your staff doing if bills aren't communicated timeously?