Yeah that is the problem , my self esteem is not allowing me to accept that I got used by the hands of such spineless people and I want him to face repercussions because I am fine of him wanting to leave me but not after being used to solve his and his family purpose. I mean I am seeking something that these kind of people have their lessons learned for the rest of their lives.
I'm not well aware of Canadian law on divorce and separation but other members have already provided inputs on that. As far as divorce goes seems like you can get it without your husband being present after one year.
Now I understand your feeling of teaching him and his family a lesson given you think they have used you to just get Canadian PR. In that case as others have pointed out you can't get his PR taken away. But you can probably go to family court and get your share in assets. If you plan to do so approach a lawyer and start gathering details of your assets.
Another way of teaching him and family a lesson is to publicly name and shame them. They may have blocked you but I'm sure there are tons of common friends where you can post and shame them. Issue would be given that you think they used you tells me they are much more shameless then you and they will hit back with allegations of their own and it will be a game of he said vs she said. Of you're determined think about it and discuss with common friends and proceed.
Also, in today's day and age it would be extremely difficult for him to completely vanish. Even if he has blocked you I think his social profiles would be active. You can ask any friend to figure out where he is working given he would be on LinkedIn etc.
My sincere apologies for being presumptuous but I really think if you wanted to locate him it should not be this difficult to locate and send summons which you want to send. I get a sense that you still have some hope at back of your head and you are reluctant to take that legal step as of yet. Again too many assumptions from my end so I apologise if none of this is true.
It is a hard time for you and we as strangers with our best intentions probably can't comprehend well enough what you are going through emotionally. All I can say is that you need really good friends right now and then whenever you can think hard and long how you want to proceed. Your next steps would become clearer after that.