Additional Business Line Declined

Vodacom had debited my company account in June and July 2015 twice without authorization, the debit orders were returned as no arrangement in place,i was subsequently charged fees for unpaid debits,i brought this to the attention of VBS Admin&only the fee charged on my Vodacom account was reversed,i sent a copy of my bank statement to VBS Admin with no response,it has been 48hrs,i paid only half my bill as my fees were R350.00&the balance due to Vodacom was R301,13, i then saw an online promotion & did an application to add a new line to my Vodacom account,they then informed me that the arrears needed to be settled&then only can the application be reviewed,i did so immediately and now only to be informed that i would have to wait 3months to re-apply,this is ridiculous as the reason my account was in arrears was because of my dispute with Vodacom so why am i being prejudiced by it,after numerous calls to the sales department i spoke to the manager Allison Adams who was totally unhelpful and couldn't tell me how else further i can take the matter, I have even sent through emails to VBS Business with no response,in 3months the promotion will be over,is this how Vodacom treats clients