Cell C and their aftersales service

I have 2 existing accounts for the past 4 - 6 years with Cell C. I pay more than 1,5k per month on my accounts. My account has fallen in arrears with R144 which I was only notified of when my cellphones where both Soft locked. I then paid the amount but still my phones remain locked. I personally dont agree with treating long and loyal customers in this manner. I have a very bitter taste and dont think when my contracts is due for upgrade that I will continue with CellC