Convert low quality feature film into 4k (& above) quality

To Whom It May Concern, I am currently working on a 2D (basic) animation feature film.

The images are all digitally drawn.

Unfortunately, the artist broke his promise and did not provide his artwork in 4k quality (the resolution that I asked for). Therefore, my entire film is patchy, some shots are high in quality, and some are very poor in quality.

I don't even know if this is possible.

But I need someone to convert the entire film into 4k and above.

I am using Adobe Premiere Pro thus I have flexibility in saving the video file.

However, I would rather not compress the film yet as I still have more work to add to it.

Is there anybody out there that can help me out?!

P.s.

the duration of the feature film is around 80minutes.

ONLY APPLY FOR THIS JOB IF YOU CAN 100% GUARANTEE 4K/8K or above quality