Canva Print Prep Expert Needed

I need help fixing brochures and flyers made on Canva that aren't printing correctly for gotprint.com

1.Issue Low Resolution/Pixelation: File contains images/artwork/elements under 300ppi. 2. Issue Missing Bleed: Artwork background should extend to the edges, borders are present, we cannot guarantee even cutting. Files are missing .125 inch bleed. 3. Panels do not align with our template. Please make sure outside artwork is using outside template and inside artwork is using our inside template. Any text/graphics you do not want in the fold or trim please have within the safe zone area.
Requirements:

- Improve image quality for clear printing
- Add bleed and safe margins around designs
- Check and prepare all materials for print

Ideal skills and experience:
- Proficiency in Canva
- Experience with print design
- Attention to detail