miss sold upgrade

hi my name is ganasen chetty i'm currently due for an upgrade with cellc, so some one from the phoenix store in Durban called me and said I was eligible, so I called in and ordered what was advertised an Huawei ascend g7 on smart data 1gig for R299 a month, my current/previous plan was smart chat 100 with a blackberry z10 for R379 a month, the sales agent \bridget"did not inform me that I would have to pay my existing fee and receive the current benefits(not the new plan) for the next 3 months and thereafter only migrate to my new package. over the past 2 days I had made numerous calls to cellc customer care"