Vodacom cannot fix their data error for 6 months running

<p>Very bad service. Every month since I renewed the contract, I have to log an enquiry for them to fix their data error. The contract came with a free 1gig data, but every month I need to ask for the data, and then it takes a week to investigate and a promise that it has been fixed on the system. How difficult is it FIX this, after 6 months.</p>