Problem installing a blind switch

Hello,
I recently bought a Zigbee switch for blinds, so a control module (see picture). But unfortunately the module was too big to fit in the “wall channel” where it should normally fit (see picture).
Did any of you have the same problem or know of another smaller module that would fit? Or simply another method that would allow me to control my blinds with Smart Things and Google Home?

This would be very useful to me.
Best regards and have a nice day !

what country are you in?
what is the size of wall channel?

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Thank you for your interest. I am in Switzerland and the diameter of the channel is about 5cm so 1,969inch.
I hope this helps.