I have consumed simple web service for addition of numbers and returns the result in variable which is in the following format
You can use an EXECUTE SQL TASK and use code similar to this in the task:
DECLARE @xml xml
SET @xml = '
35 '
SELECT @xml.value('int[1]','int')
Of course, you will need to modify that query to insert and modify the @xml
variable to your source variable. I am only trying to point you in the right direction.
Raj