Tatyana Zak

I received the prints, and they are very poor quality. The colors are washed out and very blurry. The images of those sizes where provided w/ high resolution of 300 DPI. I will not be able to re-sell those prints. I'm really concern because I do not want my customers to receive prints of such a low quality. Please advise what went wrong and if you will be able to fix and provide excellent / sharp and bright image quality? Can you print w/ pigment dies to get best quality or this is the quality I should expect in the future too? Please advise!