Who would you complain to about a Denist??

I am getting braces..Invisalign..well I was fitted for them twice once in early September and then again a month ago..still no BRACES and they told me it will be atleast another 3 weeks! I am beyond MAD!

I only want them so my teeth will look nice and straight for my wedding which is now less than 8 months away!!!

What should I do????

I am so stressed over this! Not to mention they already have their money...because I am paying it through a loan!!!