Why charging a 15% tip to a family of 3 is robbery

I go to prepare the chicken frequently and I have never been charged a tip is optional if one wants to give it.

Magda Cruz The information you are providing is false. Tips are optional. Ready the chicken is ordered and prepared on the spot. Your information is malicious. Ready the chicken Manager

That is if you want to give 15%, they do not force you to give an amount, it is a suggestion. I would not give them anything, I ordered grilled chicken in Reseda and I lived in Simy Valley, I came home and the chicken was dry and burned, I called to claim and they asked me to bring the chicken, as I did not take it immediately, they did not return my money Because it was already cold, what does it mean that if I wore it the same night they would sell it again? I am sorry because I have been a client for years and I think that is not the way to serve the client, I have always been grateful to them, affectionate with the owners and daughters, I do not think I deserved such a treatment, I no longer recommend anyone, before towards, and if you ask me I no longer give good references, in short, it usually happens when you have more d3 a restaurant. The cow does not remember when it was veal .......