Zapvi — My samsung a50 cover wasn't delivered

Website:

zapvi.in

I ordered samsung a50 cover online and there was no cash on delivery option available. I paid 159 inr through online mode and my product was supposed to be delivered on 23rd june. Its 24th june already and theres no news. I tried calling the zapvi number given but it was switched off. I really want my back cover atm. Or i want them to return my money if they cant send my cover.