I think the other advice is good. Either ask for a new teacher or ask for your money back - and expect that you will get what you ask for. You paid money (probably alot of it) for their professional service to be delivered in a professional manner. It is their responsibility to deliver satisfactory service or refund money.

I myself switched teachers within a studio. I was lucky that my first teacher was very nice and fun...But he was too nice! I wanted someone to tear me apart a little, because I want to be critiqued as much as possible. For me, that is what I am paying for. Basically I called and started making appointments with another teacher and it was as simple as that. Ballroom lessons are the most expensive of any of the partner dances I've taken, so I feel it is totally fair to expect the best teacher possible.