Verify if your payment has been received and if the goods have been sent. If the person has not received the money, continue with 'I paid but money was not received鈥.
If the person has received the money but does not want to send you the goods, request the same amount you paid from the person in the 麻豆社 TWINT app. If you neither receive your money nor the goods, this could be a case of fraud.