Looking for Flat for 2 months with 3 Bedrooms in the city center of Valencia

Hello. We are three girls from Greece. We will come to Valencia at 10/3 and we will stay there for 2 months until 10/5. We will do internship in places with people with special needs in the context of Erasmus plus program . We are looking for an apartment in the city center of Valencia, furnished, with heat, in good price, for smokers. Internet but that can be optional. We will prefer flats with all bills include but we won't reject a nice flat if they don't have them as long as you inform us the extra cost. We will also like to be informed about the way the payment will be.