How to unblock my tablet wifi

Solution
They would have to have changed the password to block you. Or gone into the modem's/router's settings and put a block in there.

If it is your modem/router, then you should be able to access that and fix the issue. If it is someone else's, then you will have to get them to fix the issue.
They would have to have changed the password to block you. Or gone into the modem's/router's settings and put a block in there.

If it is your modem/router, then you should be able to access that and fix the issue. If it is someone else's, then you will have to get them to fix the issue.
 
Solution