For Collins and those who had a problem
to pay via Interkassa, (Visa/Master card)
Have contacted to Interkassa and than to Liqpay,
as far as finally payment is managed by Liqpay.
They solved the problem immediately.
After one week fighting, finally I have managed to pay via Interkassa.
In case needed, their contact:
technical.support@liqpay.com
support@liqpay.com
Hope this will help to someone.