********** Upgrade

My contract which passed its 24 month contract a while back has been active on a month to month basis, this line has been **********ly upgrade in Feb this year from my 2GB data package to a Flexi 200, I only came to know about this when I contacted Vodacom on the 1st to query why my data card was not work and the fact that I was debited R709.00, supporting documents have been emailed on the 8th April 2015, my email was only attended to on the 17th as this is when I got a reply to say that my documents have been forwarded to the ***** department, my debit order has been sent to the bank for another R709.00, this ********** upgrade is causing such an inconvenience in my life right now, I budget R99.00 monthly for Vodacom, now I am being billed R709 for 2 months in a row which in turn causes other debits on my account to bounce, we have not had internet since middle of last month to date, thus unable to check emails, no internet banking to make payments, unable to gather information or submit my assignments on time, this happened in Jan 2014 as well, so what is Vodacom doing to prevent such from happening again. I need this sorted asap and monies refunded back into my bank account.