Joint bank accounts withdrawal between husband and wife

In a Joint Bank Account when Husband deserts Wife and can wife withdraw money from the Bank, since husband has put a Hold and asked Bank not to operate wife, since he is a Pensioner and has asked bank to put a hold not to withdraw the Money from the Joint Account and can Bank refuse in such a Manner, since Husband says the Pension account is in Savings Account and only he is eligible to withdraw the money from the JOINT SB account of both Husband and wife