Sick and tired of fnb's pathetic service

I am SO tired of fnb. My mother have signing rights on my account as I live abroad. I need a new credit card, and they told my mom she can not apply for a new one, I have to email ***.

I have been emailing for the past weeks but NO response. HOW do one go about getting a new card, if fnb is not assisting or doing anything from their side.