Hello,
If you choose to look further on Digikey, please be sure not to order the MP6539BGV-P as this would correspond to the MP6539B.
The MP6539GV-P should correspond to the MP6539, so ordering this would be the choice I would recommend for you.
As shown from the image in the datasheet, ending info on the IC package GV corresponds to the package type of QFN-28 (4mm x 5mm) which is what I am assuming you are looking for based on Image 1. The ending package type with GF corresponds to the package type of TSSOP-28 EP.
For the incorrect ICs, it would be best to try and return them if you can with DigiKey if possible.
Hopefully this provided some insight.
Best,
Krishan