Upgraded Contract but still paying old rates for less minutes/Data

I upgraded a contract in July. I had a Smart S with 75min and 100MB for R678 per month and upgraded to a Smart S+ 200min and 500mb per month for R228.99.

My new phone was sent, but im still paying the R678 and getting the old contract rates.

I have emailed the person over and over again from Vodacom, Ryan Adams, but have had no real feedback. Ive emailed the people that seem to work with him, but no reply.

********** ********** ********** 'Adams, Ryan, Vodacom South Africa (External)' **********

Please resolve this issue. this is the 2nd major issue i have had with Vodacom this year. South Africa's "best" service provider has fallen a long way. I can honestly say i get 100% better service from Telkom.