*****ing and calling it a migration charge

I upgraded my contract in January this year. It was a special at R169 a month. I checked with the consultant if there are any additional charges as I have had a bad experience with telkom already. He said to me no. Now all of a sudden I am being charged an additional R80 some odd per month for what they term a migration fee! What the hell is this? Just because I chose something cheaper they are charging me a fee! Telkom you had better reverse this fee I'm tired of your company taking advantage of clients. You did not advise it would cost me more to upgrade at a lower fee per month. I want this resolved urgently as this is termed *****ing. This is why I cancelled my debit order because you have done this to me so many times before. Resolve now else you will face legal charges.