ZARA Bright Red Leather Flats

Have been worn a couple times, hence the creasing in the leather. The glue on the inside soles is very flimsly, and so both soles have been unglued from the inside of the shoes. This should be an easy fix, but I do not have the right glue to attempt to repair it. SIZE IS EU39, which translates to a US8 according to the ZARA website.