@Aymen Hello!
To be honest I don't understand your question, my english isn't good, sorry.
So you mean how to buy FB profile if your own was blocked?
It depends on your aims.
First thing you should try to unblock your own profile.
Of course for new FB you should use proxy and after purchasing new profile you should use it within 2-3 days for warming up. Then you can create business manager, but in my opinion the easyarest way is a buy fb profile with bussines manager and also to buy with completed prohibited advertising (not sure about translation).
If you have a lot of profile you must use proxy and special browser(like aezakmi or something else) for hiding yours PC from facebook.
I suppose you should write about your aims and hope you will get answers.