I sent the letter to experian. I attatched everything you guys told me. Invalid proof from the CA, letters I sent them etc.
They just said that they already had contacted the CA and they confirmed that I owe the debt. Apparently they just asked them and they said " yes, he does owe it".
They said "already" , because I had tried it online before. And that's just what they told me the first time.
You guys tell people here all the time that this is the way to go after the CA failed. Apparently the credit bureau dosen't give a damn!