Unable to upgrade handset-Mistake on my account

I was told to email Vodacom admin after being put through to various Departments at the call centre and found no one that could assist with my issue, spending lots of time on the phone, explaining the same issue to each and every person over & over. I then emailed Vodacom Admin who provided an automated reference number. The Vodashop tried to assist and follow up with my reference number but either found no answer or waited for ever for assistance and still no joy. Vodacom system shows \finance deal issue"with regards to a handset. I want to upgrade to S6 and pay monthly for handset on top of contract but the system does not allow it! I have a debit order with Vodacom and also my company that contributes a specified amount per month to my contract. Vodacom made an error a while ago with the loading of my debit order details. This was corrected and all outstanding's was paid. I believe this is the issue even though it wasn't my fault! I have email support from Vodacom to support that it was their mistake and included this in my communication with them! I would really appreciate if the right person can phone me so that we sort this out! Service I received so far has been shocking!"""