Question about Canton Movie 165

I've had a Canton Movie 5.1 set at home since 2012, but I can't find out whether it's a 135 or 165 model - mine look exactly the same from the shape of the 135/165 models. Now my AV receiver from Pionier has also broken down after 13 years (at that time it was bought as a set together with Canton Movie 5.1). I'm looking for a new AV receiver that I can use with my existing Canton Movie ( 135/165 ???) - and possibly add 2 or 4 additional passive speakers - so an AV receiver with 7.1 or 9.1 channels. Does anyone have any experience in the audio sector when putting together such systems or what exactly you have to pay attention to? I would also appreciate advice from a Digitec consultant who is familiar with the subject gefunden🙏🏻. Thanks to all.