LTE Upgrade

I upward migrated from LTE 15 GB to LTE 50 GB. I wasn't informed that I would incur additional fees and the T&Cs from Telkom conform - \The subscriber may upward migrate without any penalties at any time during the fixed term agreement"(copy and paste of their Mobile T&Cs) 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 (copy and paste of their LTE T&Cs). Yet"