I gave a service to my client like he asked me to send something over whatsapp and i provided it and once he received all those product he maid the payment but now he is asking me to provide full refund otherwise he will take some legal action.... I am very confused what to do? because I have used any shipment or something to send those things to him and he asked me to give all these products to someone he knows and I gave it to him and he is asking me to refund. amount is so big like $20,000 US DOLLAR. please help what to do
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