If through phone confirmation, they just need the name, number and expiry date. No CVC code. Only during online booking, they need the CVC code. And when I say 'online booking', I meant the HTTPS transactional page, not the one where you fill up an auto-email form.

Disputing a Charge on Your Credit Card Statement

If your credit card statement contains incorrect charges or charges for products and services you did not receive or did not participate in, you can dispute those charges. A key benefit of using credit cards is that credit card companies may be able to dispute a transaction on your behalf.

Common credit card disputes include:
Being charged twice for one purchase
Being charged for an item you didn’t purchase
Failing to receive a refund
Receiving damaged merchandise
Failing to receive ordered products

In these cases, you can work with your credit card company to eliminate those charges from your statement.

Both Visa and MasterCard offer Zero Liability policies: you will not be liable if your card or card number is used without your authorization, as long as you comply with the Cardholder Agreement.*

1. Resolve disputed charge with merchant

The most efficient route to getting these charges off of your credit card statement is to work with the merchant. By speaking with either a sales clerk or store manager, and providing receipts and other documentation, you may be able to correct the mistake and get them to issue a refund immediately.

2. Contact credit card company

If the merchant is not cooperative, you should turn to your credit card company. You need to dispute a charge shortly after it appears on your statement. If you dispute a charge after you paid the credit card bill, it may be too late to reverse the charge.

3. Document credit dispute

While your credit card company will collect essential information over the phone, you should also document your credit dispute in writing so there are no questions about it later. Draft a letter, detailing the erroneous charges, giving proof of what the accurate charge should have been, and outlining the steps you’ve taken to resolve the issue. Send a copy of the letter to the merchant as well as your credit card company.

If your credit card company also requests that you fill out a form regarding the credit dispute, you can attach your letter to that. If you don’t receive a form to fill out, ensure the letter to your credit card company includes your account number, the credit card statement date, and a detailed explanation of why you do not wish to pay the charge in question.

4. Be patient

It will take your credit card company several weeks to investigate the charges. If you are asked for more supporting documentation or further explanation, you must respond promptly to keep the process moving.

5. Pay your bill

Make sure that you still pay your full bill, or you will still accrue interest. If the dispute is successful, you will then be refunded your money.

CVC Code are required for them to do a Pre-Authorization.

Without the CVC they are unable to "lock" the amount from ur card, meaning they will not book the room for u.
Credit Cards are never safe. If you are so afraid, DONT USE CARD BUT USE CASH.
And keep the cash in your house, not bank.