jsonpathRetrieve array element in an array from JSON response

Hi All,

I'm trying to retrieve an array element within an array (sample response attached) from a test step in a test case.   Within this response, I want to retrieve an array of Telecoms values where the SystemCode ==phone and then get the first element from this array to use in another step.

I tried doing this with a property transfer step, but the problem is that when I retrieve the array using this JSONpath as the source, it returns an empty array even though I it should return an array of 25 elements. 

$..Telecoms[?(@.SystemCode=="phone")].ValueString

So, I'm trying to do this with Groovy script.  I'm not familiar with Groovy, so I'm cobbling this together based on what I've been reading. I know the syntax isn't correct, but I'm hoping I can get some help to get what I need with this bit of pseudocode:

import groovy.json.JsonSlurper 

//retrieve response from the 'All Matches' test step
def response = context.expand( '${TestStepName#AllMatches}' ).toString()
def slurper = new JsonSlurper()
def json = slurper.parseText(response)

//get an array of values where the Telecoms.SystemCode = 'phone'
def phoneArray = log.info(json.Itemlist.Telecoms[?(@.SystemCode=="phone")].ValueString)

//get the first element from phoneArray
def phoneElement = jsonParse[0]