On the wrong contract

Were told that I can use a Gig a month. Then found out it is only 500 megs because balance must be used at night. Then I called and the package was changed to 100 min. I am paying R299 per month for no service. If you go into the store no body can help. Cell C is definitely not recommended. After being on the phone for 18 minutes I was asked to call another number. I do work and this is not acceptable. No body should take out a contract with Cell C.