Account in Arears (1 month)

I have 2 contract lines with CellC which I took out early last year and have never been a bad payer but now that I skipped 1 month both my lines are suspended. I received an sms notifying me of the unsuccessful debit order and responded with a date that I will be able to pay my account but a day later my lines were blocked. I have tried to contact the customer service but cannot get through. This is unacceptable as I am not a bad payer. Why couldn't they give me up until next month to suspend the lines and why was I asked to respond to the sms with a suitable date if they were not going to consider it? There are times when 1 encounters unplanned situations that need immediate attention, couldn't Cell C consider that I am having problems this month and will sure to pay my accounts the following month as I would know that I was notified and my lines will be suspended should I not pay. I mean where do they think I will get the funds now for my accounts because if I had I would have long paid. This is why people have low credit scores and do not qualify for anything because suppliers like CellC are too quick to cross out names without consideration. Id rather go back to Vodacom.