to buy bitcoin you have to be able to deposit cash, can't see how to do that on those 2 exchanges.
I agree with you, I never found a way to buy bitcoins using a credit card. So I won them and now I'm producing them from nothing.
https://www.coinmama.com/
A lot of services are already approving buy bitcoin via CC or DB in this day.
It's really not that hard to buy BTC through CC DC these days.