No professionalism or management skills displayed

My partner ordered a steers cheese burger last week and she was given a raw patty! She was called to come get a free burger as an apology, we go there today and the manager Stanley shows no sign of acknowledgement, he asks the customer to specify next time how well she wants her burger done next time rather Did we really drive all the way to be given attitude? I am battling to understand why is it so hard for these guys to take the blame of living against YOUR slogan, is it really my responsbility as a customer to specify whether i want a well done or half done patty?! These are simple basics that i expect from a big brand like you. This is not the first time this is happening, we had a similar occassion before with the other manager and he told us thats how you make your patties, in short he refused to correct his mistake. Neither of them apologised for the bad service.I am really disgusted by the bad attitude that your \managers\" give to us, i do not want to speak to you guys if you not going to address their behaviour, if this is how they treat black customers then i dont see why i should continue to buy from there..Get it sorted ASAP"