Tell your parents that you are not ready to commit to one school yet. Tell them you want to apply to several schools and then make a decision. All of the scheming isn’t a good idea.
Are you an international applicant or a US applicant?
Do you need financial aid?
Is this “counselor” your own high school counselor, or is this a person at a for-profit college placement company? Your high school counselor is obliged to support your own best interest and to take your preferences into consideration. A paid counselor is hired by your parents, and so has a much greater obligation to them.
Do your parents prefer that you study in the US rather than the UK? Maybe you can find a better option here to apply to ED.
If you are an international applicant your chances of admission are much les than if you are a US applicant. If you do need financial aid, then the amount of aid you need may affect your admission (some places do take need into consideration), and not getting enough aid will definitely affect your ability to attend. If you are international, and you cannot demonstrate that you can pay the full cost of your studies here, you will not get a student visa. Make sure your parents know that before they commit to sending you to an expensive college or university here.
I think you’re overestimating your chances of admission. You’re an international student applying to an Ivy League university. All their students have high test scores. Columbia rejects 94% of applicants, and many of them likely have high test scores too.
There are roughly 1400 freshman seats at Columbia. Only ~210 of them are international students, and they represent ~70 countries. If those seats are spread evenly, which is doubtful, your country may account for 2-3 seats. If they’re spread unevenly there may be fewer than that available. Are you one of the top 3 students in your country? That’s how good you have to be to get admitted. It’s not a sure thing at all.
Send all your apps out and just do your best. I wouldn’t worry about how to get rejected from an Ivy League university. For most people, that’s not a problem.
Try to get an interview. An alumni interviewer will do fine for this purpose. Politely tell the interviewer the truth: Columbia is a great school, but it’s not the school for you. You’re sorry to waste everybody’s time, but your parents and GC forced you to apply.
Unless you won the Nobel Peace Prize and an Olympic gold medal in the same year, Columbia will be more than happy to have a reason to reject you and to concentrate their efforts on the many thousands of actually enthusiastic applicants.
You won’t get admitted. Your parents and your GC will be none the wiser.