iphone xs max sim locked problem

Hi;

My friend bought an Iphone XS Max for me from US by Bestbuy store. She paid cash and the phone was not a contract phone. Upon arrival, I registered the device with compliance to my

government requirements. I found out that the device is a sim locked version

and I cannot use with my gsm carrier. The IMEI serial numbers are now

registered in my country, so no legal or registeration issues left for me to do

in order to use this device in my country.  

We contacted Bestbuy but they only say "the phone has to be in US, in their store, but for me no way to be there.

After contacting

Turkey Apple Customer Service I learned that the Sim Lock can be unlocked only by the

carrier with which the phone was meant to work. They didn't help me.  

If you can unlock the device and help me. The IMEI numbers are below. 

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I can sent all bills and mails about this issue.

Thanks for your help in advance.

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