We rented two bicycles and I called in advance to ...

We rented two bicycles and I called in advance to check price. They said $30 a day per bike but when we got there they charged us $37 per bike. When I asked, I was told there was a price increase that he did not know about. The manager said there was nothing he could do and simply said "what's the big deal, you're on vacation". The bikes were very old and not very comfortable to boot