On the MEXC platform, I purchased USDT and transferred 300,000 ₽ to the seller Ali999, but I never received the USDT, and the seller is not responding to messages. I contacted customer support and spent almost a month communicating with them. They told me that the seller's funds were blocked and that it would take time to resolve the issue. In the end, I still haven't gotten my money back, and I was advised to contact the police.