Issues with Email Validation Using ZeroBounce and Multiple Providers

I'm trying to get the emails using different providers and using the zerobounce as validator and problem is

1.
it is not automatically running the next provider nor the email is in the final column(If the email is invalid it should run the next provider but it dont and if email is valid it should populate the final column, also not doing this as well???????)
2.
email is not coming in the final column