Customer complaints

I wrote a complain about the service at Toyota Springs and up to now I have not get any response from the Dealership. I don't know if I am going to get my refund or not? The bad part of this is that I returned the wrong part's and the invoice I was not given document to show that I have returned the parts and it is making me worry about it. Toyota is a big brand I didn't expect such service from the dealership.