Sure, you have to pay for invitation letter and services of the agency if you use it, but anyway, almost all money you'll pay only after arrival to Ukraine.
Sure, kufanele ukhokhe uhlamvu isimemo kanye nezinsizakalo ejensi uma usisebenzisa, kodwa noma kunjalo, cishe bonke imali uzokhokhela kuphela ngemva kokufika e-Ukraine.