Credit Score Management

I heard that you credit score would go up anywhere for 30-40 point if you pay a credit card off that is maxed out (if the balance is over a 1,000.00) Is this ture?? And if not does anyone know about what it would go up?

I need to fix my credit, and there are people on E-bay and elsewhere who guarantee the full restoration of my credit. Are they legitimate?

i want to know what credit repair company will help my credit score go up legally.

I want to remove the bankruptcy from my credit reports as soon as possible.

Anyone know of a credit repair company that works?