Originally Posted by CustomBusinessSoftware

they send u notification about it if you chk notification u will see for how long u are blocked
if you are locked for joining groups i am sure its for 7 days

and when u get unlocked do not join more then 1 group or max 2 in same day else u will be locked for 15 days and if u still keep doing same they may disable your account after 3-4 times locking u.

Best of luck.