What should I do if i have orderered a customize insect screen and, therefore, its size is exactly the same as that of the window opening?

Vertical Roll-Up Insect Screen. As shown at point 1 in the assembly instructions, the insect screen is supplied pre-cut to the size indicated on the label. No cutting is required to be done, the only thing you’re required to do is the assembly of the plastical elements.
Horizontal Roll-Up Insect Screen with High Bottom Truck. As shown at point 1 in the assembly instructions, the insect screen is supplied pre-cut to the size indicated on the label. Bar and handle reduction has always to be done as shown at point 2b of the instructions. Lastly, only the assembly of the pastic elements needs to be done.
Horizontal Roll-up Insect Screen with Low Bottom Truck. As shown at point 1 in the assembly instructions, the insect screen is supplied pre-cut to the size indicated on the label. Bar and handle reduction has always to be done as shown at point 2b of the instructions. Lastly, only the assembly of the pastic elements needs to be done.