Upward Migration

I upward migrated from 10GB LTE to 50 GB. I was not informed that I would incur additional fees. The T&C's from Telkom also confirm that. \The subscriber may upward migrate without any penalties at any time during the fixed term agreement."(Quoted the agreement) AND \""The subscriber may upward migrate without any penalties at any time during the fixed term agreement subjected to the differences in the base subscription\"". Straight out of your agreement. I was debited R 895.80 and R 527.17. When I asked numerous agents on the phone"