Ioana, you are a very talented woman - but 10 dollars a minute! So you expect someone to pay 600 dollars for an hours work trying to get a single part correct. I have used top quality studios that charge half of that price. And some even less. You are way overpriced. I doubt very much you are going to get any clients. Look at the pricing of https://studiopros.com/ - a REAL actual physical studio - not a computer and a couple of microphones. And you only have three samples on your site so you cannot expect to be charging ridiculous rates when you have no pedigree. Where are the photos of the 'studio'?
'The purpose of life is a life of purpose' - Athena Orchard.