T-sql Update Query

Hi I used following t-SQL command to Update name in the TEST_DeliveryAddress  table ,need to take CustAddTest Table name.
But no errors and showing successfully run the query but NOT updating the TEST_DeliveryAddress  Table name field.Any idea what is wrong
Thanks
BEGIN TRY  
  BEGIN TRANSACTION
  UPDATE
    TEST_DeliveryAddress
SET
   name = OT.name
 
FROM
    CustAddTest T
INNER JOIN
    TEST_DeliveryAddress OT
ON
    T.[Customer] = OT. [Cust_Number] AND T.cust_seq=0
    COMMIT
END TRY
BEGIN CATCH

    IF @@TRANCOUNT > 0
        ROLLBACK
END CATCH