Try the other bike shop, explain that you are new, you know the bike is to small but they will still fit you to the bike. Let them know you aren't buying a new bike. You want to be fit to yours as best as possible. I hope thos other shop gives you better service. Just dont give up. And just a suggestion, let the bike fitter do what they know to do. They should check your flexibility and adjust the bike to you. I wouldnt suggest tilting the saddle up...... ouch......