Since I can't access Pragmatic Slots games do they offer alternative slots to play like other casinos do if you can't access these games?
For the 50 free spins bonus on registration? I dont think there is alternative since the 50 free spins bonus on registration seems to be specified for pragmatic only.
You can try to get in touch with the admin and ask them if they can offer you an alternative for it.
It is better if you are blocked to see pragmatic because you are from the blocked countries than you are able to see and play it and may lead you into a problem later.
Anyway, I heard that they are also offering other free spins bonus by email, have checked your inbox? Maybe it will work for you in case you get it.