I am very tired or this

Good day <br> <br> I had a cell c contract which i cancelled and paid off the remaining balance in February 2014 but still this cell c people are not updating the details as I keep on receiving irritating SMS's from NDS Credits... I called NDS Credits to complain about this numerous times and they told me to call cell c of which i did but to no positive outcome. May you please help i am so tired f this people.<br> <br> Kind Regards<br> Lugile Buthelezi