DONATE ERROR

I am trying to donate since many time with any different credit cards and none of them are working always sendidng me an error, I talked to the bank and they said that its all normal and free to buy online from international websites. I contacted you by Email but no answer since now, I hope this topic works since I dont know how to enter in contact with STAFF.
It's look like that my IP was blocked to donate on that website, I can free buy from others websites all around the world.