DATA ENQUIRY STILL NOT RESOLVED

I made a data enquiry almost 2 weeks ago, regarding the exorbitantfees being deducted from my account regarding data usage. My initial contract came with 1 Gig data bundle which was additional to 500MB data . Which gets topped up before it runs out. On the 7th of October 2015, I received a call from Vodacom offering me to increase my data package to 2 Gigs where and receive a free modem. I agreed, and an amount of R105.00 was deducted from my account confirming that this service had been upgraded - Order number:***3. I also received the free modem delivered to my office 2 days after. BUT my statements reflect that I have not been receiving the 2 GIg data, I have also received no notifications of my data running out before month end, however I am STILL being charged for additional data usage charged at the Vodacom Rate. Last month I was charged R2600.00 on my account. Its impossible if I have access to wifi all day and data packages which I purchased of sufficient amount. My reference is S3-9MI85-5N22, I am sick of receiving the same service sms stating that my query is being processed and in the queue. The lack of service and accountability is disgraceful and unprofessional.