I did investigate this a few weeks ago. I think Changelly is the only one. Bitstamp used to have it but they don´t at the moment.
Well, first of all let me warn you because there are many scammers who profit from cryptocurrency and people who work with it. Therefore, I advise you to work only with trusted platforms. For example, BTCBIT https://btcbit.net/buy-xrp-with-credit-card as an example of some reliable system. I spend no more than 15 minutes on all stages of the transfer and pretty satisfied with my income