Myflowerapp — Order taken product not delivered

Address:

289, Sector-63, Near Fortis Hospital, Noida - 201301, India

I ordered a cake for my father's birthday through myflower app the order number is[protected].They didn't deliver the order and they already took money from me.Now they are telling they don't have half kg cake and I need to pay additional amount for the product to get delivered.I told them to give my refund as I paid for half kg cake as advertised by them and not for 1 kg cake which they are telling now.They are not responding for asking refund.