Vodacom too big to care for customers

I've been a loyal customer for more than 15 years, and never had a problem paying my account. The first time in my life that I have a shortfall and could not keep my account current, my line is being blocked, even after I made a payment arrangement, and the consultant not advising me this will happen. And do not even try to contact accounts to unblock the line. They are not interested in helping you until you have paid.