OP can you upload English version of the screenshots? I do not understand the language. Also can you upload the chat log with the owner or whoever it was from their side.

By the way, to me it does not look double spending.

https://www.blockchain.com/btc/tx/39d840db5f8bee273034dc925b3438aeecae5f1b20113bf6cb7da3c4af7e1c6c
https://www.blockchain.com/btc/tx/8b1c25ad26ffab12e64ea2cac96d1ba6dae4344bf7b2e1beef920f5044e6de4c

In both transaction BTC confimed to this address: 1Ga9L4brgKQBRFzzUnPuaCiPjQS2kZjTAE