Thanks to this printing service I found another one where the customer service can help you with issues and actually care!
The people who work at this service don't care enough, I couldn't upload my artwork due to size, any professional knows that a perfect artwork can't print on lower than 300dpi resolution, the max size on the site doesn't let you upload the artwork even if it is for a big canvas, and the people in Best! Canvas don't care if you send 1000 emails asking them for help, I guess they just get paid whatever they do anyway!