credit limit

Since I have had my contracts with MTN I have never skipped a payment.<br> <br> It all gets paid via debit order, yet because of the way mtn works I always owe them money.<br> <br> Now my phone gets cut even though I have never missed any payment.<br> <br> So I phone the contact centre (808) to sort this out. But there is no answer even if I hold for 30min.<br> <br> this irritates me...because being cut-off when I never miss a payment is *********!!!!<br> <br> now I have to take time out of my busy day at work go to a branch to get this sorted out!<br> <br> and then they say that all I can do is up my credit limit!!! Why? when its because of a mtn procedure that there qill always be money outstanding!!!