Do you mind posting a pic of her??? Unfortunately(or fortunately for me)not all yorkies look the same
even those within the same litter can look different from each other. In any case if you paid for a yorkie that is what you should have gotten from this breeder not a mix(if she truly is one). If you would like to pursue getting your money back I would get a DNA test to verify your pups heritage and confront her breeder with the paperwork(did you have a contract?) and go from there. Not all Yorkies act the "same"... just as humans we are the same species but have differing individual personalities. Potty training as a whole is difficult within any breed some pups catch on faster than others, was the breeder you purchased her from using potty pads/taking her outside? I've heard females tend to attach themselves to the male of the home(this is generally speaking) and males are more attached to the female of the home. If you would like her to be more attached to you I recommend you being solely responsible for feeding, playing, treats, bathing, etc(if you aren't already). This may help but puppies are known to choose their favorite person...I'll attach a pic of my pup Rasta whose almost 4 months to compare. I dont have a "snorkie" or know anyone who does so unfortunately I can't assist with that but I'm sure others will be on shortly and can! Welcome to YT!!!