bought a T-mo locked a11 for cheap off of market place without knowing it was locked or thinking to check. fast forward almost a year or more and now I desperately need some help here

After getting a reason code 19, and getting denied an unlock request by t-mobile because they could not verify legal ownership and told me to have the random stranger i met once get a hold of them. The IMEI passed a blacklist/stolen check. What are my options here? Anything? Can't they look at how long since the account associated with the phone originally was created, how long since then AND when I bought, see that it has not been reported and call it even?

A second attempt a couple days ago had the effect of them not even being able to verify it being a tmobile device. I assure you it is...lol. Jesus, I'm too poor for this shit right now...