Blocked iphone activation

Hello. I bought a used iphone 7 in 2018, the former owner deleted the account and erased all data. I used the phone for about 9 months with my account. Back then, the phone had ios 11. After I updated ios to 12, activation was blocked. Since the previous owner did not remove the iphone from the "find iphone" function. The previous owner could not be found. Since then, the phone has not been used for 2 years. What can I do? Is it possible to unlink the device from the apple id of the previous owner of the iphone? Country Kazakhstan, city of Almaty. There is no apple support center in the country. If necessary I can write the apple id and password with which I used the iphone

(1P) Part No. MN902B/A

(S) Serial No. F1****G7H

IMEI/MEID: ****

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