Extreme humiliation and total disrespect to my parent's identity

A call center agent by the name Nomfundo just earlier called me to offer/sell a particular product to me. In the tenure of the call she asked for my personal details whick i provided, she then asked for my mother's personal details. I provided those as well, and the young lady just bursted ouy with laughter. I asked what the jokes was, she continues laughing and said something about my mother's name is funny. And also said is it because zulu or something. THIS, I did not appreciate at all, I felt she was highly disrespectful and had no place at laughing at my mother's details.

I have banked with FNB for some time and it's the first that i was humiliated and made to feel this way. This is another reminder of the former regime where our parents had to be named by representatives of the regimes because they could not pronounce our parents' names. I will not at all have this. That is my mother's identity and she was named after my great grandmother whom I am highly fond of and respect to the T...

I'd like a formal letter of apology written by Nomfundo, making a full apology in this regard. She should as well tKen to DC for her behaviour.

Regards Quince