Why can't I pay for my Russian e-visa?

[okllee]

I tried several times with a Mastercard and a VISA card, both didn't work and both times I do everything but the payment is always unsuccessful. I don't know what to do, after just a month I will go to Russia and I don't think I have time to make Touristic visa since it will take up to 30 days.

What should I do..?