Combine my invoices without my approval which is causing problems for my business!!!!

<p>Account number: I ********** -8. Vodacom contacted me and asked me if I wanted to upgrade my plan and I agreed. Since then which is two months ago, they decided WITHOUT MY CONCENT to combine my numbers ********** and ********** 408 onto one invoice. Now they are telling me they cannot split it again. These numbers are used for different clients of mine and I need to send individual invoices. I already lost money last month because they refused to split the invoice. I need this invoice split immediately so that I can invoice my clients accordingly. Alternatively I will seek legal advice as I am currently loosing income due to decisions made by Vodacom without my consent.</p>