Fix Roblox Studio characters in Blender

Hi, I need someone who understands Roblox Studio and Blender.

I have around 35 existing voxelized 3D character models inside a Roblox Studio map.
The models are already created and already placed in the Roblox Studio file.

This is NOT a modeling job.
This is NOT a redesign job.
You do not need to create any new models from scratch.

The task is only to fix the broken/buggy colors, textures, and materials so the characters look correct again.

I will provide reference images:
- BEFORE image: shows the current broken/buggy version
- AFTER image: shows how the character should look after fixing

What you need to do:
- open the Roblox Studio file
- take the existing voxelized character models
- import/export them into Blender if needed
- fix the material colors/textures
- make the colors clean and visible
- keep the original voxel/blocky style
- keep the same character shape, size, and proportions
- do not remodel the characters
- do not sculpt, rig, or animate anything
- do not add high-poly details
- keep everything optimized for Roblox
- put the fixed models back into Roblox Studio
- send me back the finished Roblox Studio file

Very important:
Before doing all models, you must send me 1 fixed test object first.
I will check the test object in Roblox Studio.
Only if the test object looks correct, you can continue with all 35 models.

Budget:
Total budget: €20 for all 35 models

Delivery time:
1-3 days

Please only apply if you are okay with the budget, can do the test object first, and can deliver within 1-3 days.