"terror frenzy" X "Invoking the Beast"
The default is to not refund the cost of a canceled card. Specific text must be must present to refund the cost, that text is not present here. So, player A must still pay the cost for Terror Frenzy.
Name: Invoking the Beast
[abo] [REFLEX] Cancel a frenzy card played on this vampire as it is played.
[abo] Only usable before range is determined. This vampire has +1 strength for the remainder of combat. A vampire can play only one Invoking the Beast each combat.
[ABO] As above, with an optional press this round.