Having done the searches for a CV writing service myself I found them all to be vastly expensive and not nesseseraly aviation related!!
I was however recommended a much cheaper service some time ago which is done by a commercial pilot who has also worked in operations and prior to aviation came from a recruitment background - so good for other aspects of the industry as well. He charged me £18 and totally transformed my CV, so for that cash it was well worth it.
If you drop him an email on
[email protected] he will definatley be able to help you.
good luck
ps. check your pm's