Trying to find out contract cancellation fees
I have a Telkom LTE-A 100GB x 24 months package. I am 12 month's into the package and want to know how much it will cost me to cancel the package.
I phoned in to the call centre and the initial comment was that if I cancel I will be charged the full monthly fee for the remaining months. The lady suggested that I rather email as she was not actually sure. 
I emailed my question to  **********  They sent back a mail saying I need to send any mobile cancellation request to  ********** 
I did so, and received a message that the email was not delivered as the mailbox was full.
All I want is to know what my total cost/fee/payment will be if I cancel my contract effective on 31 March 2018.