The majority of experts agree that paying someone to repair your credit is a waste of time and money. It's also worth noting that a credit repair company will not be able to repair your credit. This is due to the fact that they do not have special access to the three credit bureaus (TransUnion, Experian, and Equifax) that would allow them to change information in your favor.
Furthermore, credit bureaus will not delete credit information simply because you used a credit repair service. Anything a credit repair company can do for you is as effective as what you can do on your own.