You don't indicate what you want to sue over. If you can find a lawyer to take your case you can sue but it will cost a lot of money.

They may be claiming that you are driving up his fees with unneeded litigation and that you should pay for that. You really need your own lawyer....

IMO you are entitled to a refund, but that's it. Absent a serious injury not worth pursuing.

You "go about it" by seeing if any lawyer will take your case. I doubt it.

Suing a multi billion dollar corporation over the cost of PS is a non-starter. You will spend much more than you will recover.

No it isn't. You have asked this question a few times. The answer isn't changing.

No, and it will open you up to having pay their attorney's fees for filing a frivolous action.

No it is not common...............................................

Yes they can. They do it all the time................

You need a court order. Run, do not walk, to a family law attorney in your area.