Worst breakfast experience

I had ordered a omlette without bacon as I am hindu and do not consume pork. My omlette arrived with a piece of pork sausage in it. I let the establishment know about my horrible experience and just received an apology. I asked for a refund which I expected to have received already but I was then asked for a bank confirmation letter. I mean how more ridiculous does this get. Till today I have still not received a refund from this establishment. Had I been paying cash that item would have been taken off my bill but because my breakfast was included in my accommodation they making me beg for this money. It's been 2 weeks!! They show absolutely no remorse for what they have done. I will never step foot at La Cote d ' Azur again