Delhivery — Order didn't receive but showing delivered

On 14th my order was out for delivery but I couldn't attend the call as Iwas in college. The delivery person told me he will come the next ay but didn't. And on 16th he called me and asked for OTP. I said it and he said he will give the parcel. But he didn't have and marked as delivered. Since that day iam trying to call him but he is not picking my call. And I even messaged him. He has seen it but did not respond. He is playing with me. I have mailed 3 days back and still no reply from your side. This is how you treat your customers? So disappointed with this. I need my order. Please do something