I really buay tahan le

I really buay tahan my lady colleagues. Everyday criticize the things I eat. Everyday saying that I am fat le. So what! What good does it do to them that they have to say me all the time. 3 of them against me and always say so loudly infront of the guys colleague. I am really pissed off. I knew that I am fat. I already go gym everyday. I am not sitting down and do nothing. Must they keep saying me? I really feel like shouting back.