Netflix coupons where?

I have a question… Does anyone have netflix vouchers with a few euro / cents on them because I only have a few euro on my netflix account and I'm only missing a few euro for my subscription. I would like to cancel at netflix and do not want to buy a voucher card unnecessarily. I also have no credit card / Paypal etc.

Or does someone know places where you can buy netflix vouchers where there are only a few euro on them, because otherwise you can only get 15 euro etc.

No, there are only min 15 euro