App Store Screenshot Expert Needed

I have an iOS app ready for submission and all of the screenshots already exist. However, I'm struggling to get them accepted by App Store Connect.
I'm looking for someone who has successfully prepared App Store screenshots before and can take my existing images and return a complete set that Apple accepts.
This may involve resizing, cropping, adjusting safe areas or making minor layout changes while preserving the look of the screenshots.
The finished files should upload to App Store Connect without any dimension or formatting errors.
Please only apply if you've completed App Store submissions previously. When replying, tell me how many App Store screenshot sets you've prepared and how quickly you could turn this around.