Transaction wasnt completed

I just wish it told me what went wrong.

I tried using my capital one(master card), transaction couldn't be completed. I got a notification on my phone telling me my credit card was declined for (amount I wish to donate). My card isn't even close to maxed out

I tried using my bank card(master card). Just when it looks like its going through, it wants to verify my identity with the same info I just entered (Name/CVV/Exp/Zip) And then it tells me there was an error and I should enter my information again.

After doing that about 10 times, I tried intentionally entering incorrect information. It goes to a new screen saying authentication failed, transaction couldn't be completed.

What gives, what am I doing wrong