Ekart Logistics — Unable to receive OTP at the time of delivery

I was supposed to receive a delivery through Ekart however at the time of delivery when the courier asked me for the OTP...there was none on my phone number. He resent it multiple times yet I did not receive any OTP. Unfortunately he could not deliver the parcel and said that he will try to deliver it tomorrow again. This is the first time something like this happened with Ekart. My tracking ID is SRTP[protected]. Kindly assist.