Aww, Dolce is still adorable! He still looks like a Yorkie to me. Give him extra hugs and tell him he is your beautiful baby. He may be worried that he did something wrong.
I am so sorry that the groomer didn't listen to you. If you have the time, you can learn to groom at home. It's a lot of work, but it is also rewarding.
By the way, a good chihuahua costs just as much as a good Yorkie.