Vodacom declining good customers

I have 1 contract with Vodacom and when I saw they have another good deal I decided to go for it. I app**** with confidence as my 1 contract with them always goes off when THEY deduct it from my bank with a debit order. I was so surprised and embarrassed when they told me that I do not qualify because my account is in arrears. I told the staff member that it is impossible so he phoned the Vodacom and they told him I need to get 3 months bank statements and my ID and try to re apply. "Vodacom, if you have good paying customers, try to keep them not lose them you know competition out there are fierce and there are a lot of networks".