I want to migrate to a bigger data package

I want to migrated from LTE 10GB to LTE 50GB. No one seems to knows how to resolve this issue . Ts&Cs from Telkom confirm - \The subscriber may upward migrate without any penalties at any time during the fixed term agreement."(copy and paste of their Mobile Ts&Cs) AND \""2. 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 Ts&Cs) .<br> I was also asked to contact Sell Direct and they also cant assist me and requested that I contact Telkom.<br> <br> Thank you for the assistance and clarifying in advance. """