JPG to High-Res Banner PDF

I have a single JPG of my event poster that now needs to be printed as a pull-up banner measuring 840 mm × 2,000 mm. I no longer have any source files, so you will be working only from the JPG and recreating anything that can’t scale cleanly. The finished file must be a sharp, print-ready PDF in CMYK, minimum 300 dpi (or vector where possible) so the printer can output at full size without pixelation.

The overall look and wording should stay the same, but I would like a few minor tweaks—simple alignment fixes and a quick colour balance to ensure brand colours pop on the larger format. No content overhauls.

Please confirm you can:
• Rebuild or upscale the artwork from the supplied JPG
• Apply those small adjustments while preserving the original design intent
• Deliver the final high-resolution PDF plus a low-res proof for review within a short turnaround

My budget is already set, so bid with that in mind. Looking forward to a smooth, fast conversion that keeps the poster’s impact intact at banner size.