Spencers App - Package not delivered

Spencers online app is delivering the worst possible service possible during these tough times (Covid**). As i pump up my order to take advantage of discount and get rid of handling charges, tax etc., this shop is not delivering even one product and taking high handling charges consequently. They are not delivering as per their availability despite taking orders days before and not showing if they are out of stock. Moreover, they are giving no update on what they are delivering and when. I am frustrated trying to reach out to them for the past * days. There is no customer support leaving me terribly helpless at what they are doing.
Please help me out with this.
I ordered food items on spencer's retailer application online worth rs. ****/- through upi on **rd may ****. The order got cancelled eventually next day i. E. On **th april **** at *.**pm but i didn't receive any refund till date i. E.**th may ****. I tried contacting spencer's customer care but still i didn't receive any satisfactory response or my refund. The order id given at the time of cancellation of order is #*********. I request my refund as soon as possible and also demand compensation for not giving a satisfactory response which effected my mental health in this time of need due to covid-**.