BDO CC: How to get the 0.49% monthly add-on?

Hello! Dati yung 0.49% yung offer nila sakin then nagbago na into 0.88%. Is there any way para makuha uli yung 0.49% na monthly add-on rate nila? Sayang kasi andami kong purchases and naka 0.88% na sya ngayon.