DATA USAGE - RENEWING CONTRACTS

I am utterly disgusted by Vodacom..... I have been a loyal customer for years and have spent a lot of money over the years with you. I would like to have management personal contact me and apologies for Vodacom incompetency...as my contract was up for renewal as of the end of March. I also pay my account in store every month, at this time a consultant told me that I can go on to a month to month contract and everything as per my contract will remain the same, as I was waiting for stock of the new iphone. However I was disgusted to find out this weekend that I have R6300 worth of data owing on my account because all the PERKS of my contract fell away after my contract \ended"in March and all normal tariffs apply. However not once did a sales consultant try and sell me data bundle to try and lock me in as a happy and loyal customer and avoid the huge bills that have been happening. Whats makes things even worse is when I tried to upgrade about a month or so ago"