Manafort, certainly, through Dennis Whitfield.
Ken Cuccinelli sued the company a few years ago. He paid them a bunch of money and they did little to help his campaign.
There seems to be a real problem with these "consulting firms".
In 2012 the firm Mitt Romney hired to help him GOTV oddly collapsed on election eve and didn't make the phone calls and contacts they were paid for. Just a few weeks ago it was disclosed that Steve Bannon was a major stockholder with the consulting firm hired by Ted Cruz and Bannon was running a campaign against Cruz via Breitbart before openly going to work for Trump.
A lot of people on the right seem to be cheering their guys getting away with things but the mills of God grind exceedingly small.