Belowclouds, first, what a poor company safety attitude – blame culture. If someone were to just mention which company it was, then they would really see what name and shame means.
Second, if the limit was an AFM aircraft limitation, i.e. Max Alt, then the aircraft manufacturer could have, or should have wired the TCAS to inhibit a climb. However, for some aircraft types this may be delegated to the operator as a manufacturer’s installed option (the operator must request a change), or where the operator inhibits TCAS i.a.w. an approved modification. Thus, seek the facts from Airbus / other operators.