Yes,????rypto transactions are non-refundable, but certain fiat issues 1️⃣ー8️⃣8️⃣8️⃣ー4️⃣1️⃣9️⃣ー9️⃣7️⃣6️⃣2️⃣ may be eligible for a refund. https://www.dfrobot.com/forum/topic/384656