Change the starter charge 2 battery but car will still not start

Where I put the breaker bar was where my mechanic said to put the breaker bar and check it he also came out a couple hours later and verified that it does turn the whole entire belt moves with the whole pulley system my grandfather paid for the repairs so I got sent to the shop that he wanted they found no shavings in my oil as of they say but they said my engine was locked up and they could not turn it over with breaker bar sent it in because I had motor oil going into my starter which as far as I know possibly could pain in my rear main seal might be bad they just told me bad motor cost me two grand to put another one init turns with breaker bar but still will not start checked all my fuses they're good just makes a clicking noise change my battery terminals and still want start so in my car it has a indicator saying how charged my battery was it was not even at 12 volts so I put it on the charger going to leave it overnight and see what happens when I put it back in