I remarried without permission of my first wife. Now I am looking for support to register my marriage?

I remarried in Pakistan and my second wife knows that I was married. My first marriage was a forced marriage and I wasn't happy in that marriage. My first wife is not educated at all and it happened when I was young. I had two sons and my second wife does not want me to divorce my first wife. Now based on these circumstances, I am looking for support to register my marriage in Pakistan without the availability of the documents such as permission from my first wife or union council and I want to avail these services from the lawyers. Kindly let me know what service and support you can offer.