First question: It's already been explained why you will not get your account back. It's because you uploaded and used an abusive script on your account. Livewire has already confirmed that fact.
Second question: If you were having problems with your php mail, you should have asked us about it first. Instead you found an abusive script online and uploaded it to your account. It's too late to figure out what went wrong from before because all access to your account is permanently revoked.
Third question: Again, it's too late to do anything here. We could have given you advice on how to solve your php mail problem, but you never asked us about it. Instead, you uploaded an abusive script to your account. The account is permanently suspended and all access to it is revoked. There's nothing else that can be done.