Ok so I have this WhatsApp group and there was guy who responded my old message (not so old) and kinda rude message he got there.

So I got mad and sent another rude message to him. He was " Woah chill bro! There was error while I was playing a game with my friend and sent him some messages. " I was like confused because it's respond to my message and he was talk to his friend AND THis PrObLeM sTIl NOt FIx?
I kinda want to leave the group and uninstall my WhatsApp because of FUCKING ERROR-