Absolutely, do not pay for your Netflix subscription with a debit card, bank transfer, etc. Use only a credit card.
There have been numerous stories about Netflix making multiple, unjustified withdrawals from debit accounts. If Netflix does overcharge you, the burden will be on you to prove Netflix made the error. You can probably get your money back, but it will require a lot of work on your part.
If you use a credit card and decide that you are not happy with something Netflix has done, you can always call your credit card company and dispute the charge.