I put a claim in for PPI on my credit card I never authorised originally. I asked on the phone if this would be a valid claim and was told yes. I paid the £50 (when other companies are free) thinking it would be worth it, but they turned out to be a waste of space. I sent all the evidence in they needed, a year and a half later was told my claim wasn't valid. They sent my £50 back ages later, and they also have terrible customer service. Don't use them they're not worth it.
But remember! They have a 96% satisfaction rate based on a small number of people, they don't mention the thousands who they mess around. Pathetic company, go with someone reputable who are not low level educated law entrepreneurs