IGNORING CLIENT REQUEST TO CHANGE CORRESPONDENCE LANGUAGE

I have been a client with MFC since 2018, and I have repeatedly requested via e-mail and telephonic conversation that the language of my statement and correspondence be changed from Afrikaans to English. It has been 6 months, and this is still not right. I do not understand why it is so hard for change my language to English!!!!!! I am so gatvol of the inadequate service received. My instalment has also increased and I have not received notification thereof.