goaltending or not?

[xxssmen]

Player A goes in for a layup while player B attempt to block the shot but misses and slap the back board hard which cause the backboard and rim to shake.(ball rolled out)

I blew my whistle and called a "T" on player B, as I report the "T" to the table, team A convinced my partner that it is also goaltending and that the basket should count and plus the "T" on top of it. So now am in a debate with the players and trying to convince my partner that they canot have both goaltending and "T" by rule.

I can't find my rule book, so can u guys help me out on this ruling?