Hey I believe their could be various things you are doing wrong, Like maybe the socks you are using is bad. (Blacklisted) Try to change your provider if this is the case!
Another problem could be the CC, It may not have the funds for the item you are trying to card. (It may also be dead or región blocked, If you checked it before doing anything else with a Netflix, Spotify or whatever account and it passed than it still could be the CC that is bad.)
When I say bad I don't mean "Dead" I just mean it doesn't have enough funds or it's region blocked.
If the CC couldn't pass a Spotify, Netflix, Deezer or whatever free trial, Than it's dead.
It could also be that you didn't clean your pc or you didn't clean flash cookies.
It could also be that you didn't spoof your MAC Address.
It could also be that you didn't spoof your UserAgent.
It could even be that you didn't set your Timezone and Keyboard Language to the CC holders location!
You could also try to spoof your Geolocation to whatever city or even to your CC holders house! (By using the exact Latitude and Longitude coordinates)
Their could be more problems, this is all I can think of right out the bat.
Hope this helped you in some way!
