I buy btc with my credit card using https://cryptonex.org service. Here's what one needs to do:

1. Select a cryptocurrency and its amount on the website https://cryptonex.org or in your backoffice https://wallet.cryptonex.org
2. Specify your wallet address. (If you don't have a wallet address, register on https://wallet.cryptonex.org The wallet address can be found on the Deposit->Bitcoin tab. Copy the wallet address and paste it into the form).
3. Enter the bank card details.
4. Go through a simple verification.
You will receive notifications to the specified email address, check the mail.

Pay attention:
You can pay in any currency, exchange for USD or EUR is made at the rate of your bank.
The first purchase is from $50 to $10000. The daily limit is up to $20000. The monthly limit is up to $50000.