Spouse visa returning after travel and Separation

[Simon97]

I came as spouse visa,
After few months i called the police and claimed the i was unhappy and that was been treated bad, the police didn’t take action against me or him (My husband ) then i went to the social services and they advised me to make visa transfer form to transfer my visa to the gov. But i didn’t wait for the process and i traveled from UK to my country and didn’t come again and I send the social services that i will not come again definitely to UK , after few months i wanted to return back again to my husband and our relationship started ti be good again we still married, but i m now about one year out of UK , and unfortunately I received email that my visa will be cancelled soon .
We asked solicitor what is our situation now
He said that my visa already cancelled upon my departure from UK
and if i want to come again according to the email i received that i need to make new application
The solicitor said it will be with very hard security evidence and maybe yes or no

- my question is what is this evidence and if it hard to provide it ?
- is what said true that my visa already cancelled upon departure? And how do they know that i traveled
- can i claim against this decision before cancelling
Not that i m not with my husband about year now
- if every thing was okay / i will be under new immigration rules for 10years till ILR ?