Dmart Ready — Harassing the customer and not delivering product on time

I have ordered glossaries through Dmart Ready and after marking me to wait almost 48 hours, said they cant deliver it on time and asking me to wait another day. Hope this not the right way to treat a customer and they are making customer fool by false promise like they will deliver it in the timeslot given. It was great humiliation to me and the general customers. for the refund, have to wait for 5 working days. Now, dont have money to buy the product from other vendors too. Please treat this on a priority basis and get compensation for the waiting period and the humilation it caused