i was there today to get oil change for my camry,a...

i was there today to get oil change for my camry,after a while lady from sevice asked me if i want to get my rear brake replace becuase she said they are bad,i said i am not having any issue yet and i will wait.
after i picked ud my car,i dont know what they did but every time i brake i start hearing very loud noise from rear brakes.i am assuming they didnt put same brake peds or didnt put any brake peds,i called her right after,she said they didint do anything..but i can tell you %100,it is not same brakes like it was before,
i will go there tomoroow again,lets see if they will take care of that problem,i will update my reviews once i get any news here