Poor sales advice costs me money!

I upgraded from Blackberry to Samsung. I went into the Tygervalley Office. Suzanne sales consultant assisted me. As my previous contract on Blackberry I received free internet, facebook, etc. when I specifically asked Suzanne how does paragraph 5 of the contract affect me. I was told that I can make use of my phone exactly as I normally do, but on the 1 December when my new contract begins i will be using my data. She then cut out my sim card and placed it in my new phone. To my dismay this did not occur as my bank account was debited with R2700 on the 23 december. I immediately went into the tygervalley offfice. I was told that someone would contact me to get my side of the story. This did not happen. My request for a refund was declined. Why must the customer be penalised due to lack of knowledge, experience from the tygervalley vodcom staff when I specifically asked about the data and the changes. I have had to followup from myside. I have always been a vodacom client but the way this query was dealt with is unacceptable. Train your staff to provide clients with the correct information. Its about the principal of what i was told at the time and All AT MY COST NOW.