I just found Suri´s "trash-shoes" LOL. I know that she looks so cute on those heels BUT come on!! a hole on the toe it´s not "Suri´s Style" (^.^)
Anyway this has an explanation. These shoes wasn´t made to walk around the streets even if are the glamorous "Upper East Side". These heels are "ballroom shoes" so was made to be used in rooms with floors suitable for dancing. Therefore, if you used in unsuitable places most likely to break easily as Suri.
Suri wore these Ballroom heels on several times during her last trip to NYC on early november and as ALWAYS she removed the strap. These are the Syllabus Accent shoes by Bloch and you can get it for $23 or £14.95