Reclaiming your own PPI is very easy if you want to do it, so DONOT use a claims company, they will take 30% of the cash as a fee.
All you have to do is write to the company you had the loan/card with and ask them if you have had any PPIs and if so you want to reclaim it. They have to do all the work and tell you if have a claim and then repay it.
By the way ALL ppi claim companies charge a fee but they try to diguise by say things like ' No up front fees' they just take the cash off what you get back. Not bad for writing a letter.