Delhivery — Customer service is awful

I ordered shoes from H&M online store on 17th April. Ot eas shipped the same day and reach Bangalore on 19th. Previously 5 the ETA was 19th, but it kept getting delayed further and further. Tracking information showed the reason for delay is customer was unable to be reach. I didn't receive amy calls nor did anyone from Delhivery came to my address. It meant they falsely marked my order as delayed. Yesterday, on 24th the delivery date was shown 25th, but today it was postponed again to 26th. Iraised several complaints on their app but absolutely no response. Their helpline number has a bot, and no option to talk to a human agent. It is truly frustrating to deal with this agency!