Luggage transport - Paris to Interlaken West

ear All,
Hope all is well! Just wanted to get some suggestions, especially on the transportation of my luggage from Paris to Interlaken West.Our train journey from Paris to Interlaken West is as follows:
a. Paris (Gare de Lyon station) to Bellegarde by TGV train.
b. Bellegarde to Geneva (TER)
c. Geneva to Bern (IR)
d. Bern to Interlaken West (ICE)
We are travelling on March 31 (Saturday). Looking at three different transfers here, its going to be hectic as i am travelling with family including my parents and kid and i am looking at luggage services being offered.
Looking at the site http://help.tgv-europe.com/en/services/transport-luggage, i see that we have an option like "Travel light with SNCF's "bagages à domicile", our door-to-door luggage service".
Does anyone know of how is the service and how can i book for it? Also, approximately the cost is something i need to know. I am in India currently. The Boutique shops are in Belgium, Italy and other european counteries only. So, i dont see a way to contact them as only physical addresses are given in TGV website.
Can anyone please give some suggestions? Thanks a lot!
Regards
Gautam

Hello Gautam,

It looks like you can arrange for that service at any larger railway station in France: "From a customer sales agent at a station, SNCF shop or approved travel agency in France". So you could do so in Paris.