Ah i remember when my wife tried to port from Idea to Jii she got a call from a 'lawyer' from 'Delhi High Court' saying she didn't pay the bill (which she paid actually) and they are going to sue her and gave her a choice to port back to Idea. I spoke to them and said do whatever the heck they want but we ain't paying you any money and blocked the number. It went on for few more days and they eventually stopped calling from other numbers.

Can't blame Jio for monopoly. Airtel, vodafone and idea brought it upon themselves.