Telkom does not tell about admin fees

I had a month to month contract with telkom data and in february I migrated to a data contract with more data. Nobody in the telkom shop mentioned any admin fees only installation costs and prorata ammounts. We asked repeatedly if there are any other costs and the answer was always no. Then i received a bill for R300 more as what they said the account will befor an admin fee. When I went into both telkom shops in cape gate shopping centre they assured me that I am not supposed to pay an admin fee on the migration of contracts. They logged a complaint and said someone from telkom will phone me to sort it out. I waited 3 weeks and heard nothing. I phoned them today and they just told me that I am liable for that admin fee ammount. I cant understand how they do not tell you before you take out a contract about the fees and expect you to pay the money and that the shop tell you you are not suppose to pay the admin and telkom say you must. This is ***** if they dont tell you beforehand. This is very very shocking service from telkom.