Attaching not satisfactory - toll service

Due to the size of the Lumia 1320, it was not possible to attach the film without air and dust conclusion.
A complaint from the merchants was edited very accommodating and I got sent after sending photographic evidence a replacement film.
Unfortunately it did not work with me and with the second experiment, so it was ultimately a costly experience. I've been using the device now without foil.

Subjective experience of a user who has already installed several films on various smartphones.
About Tips from dealers in the Stuttgart area, which can attach a sheet to the Lumia 1320, I would be grateful.