Ferns N Petals — Delayed refund of a service denied

I had ordered a flower bouquet through ferns n petals on june 29 and the delivery was expected to be done by 3 pm on june 30. Not only the order was cancelled without any prior notice but we were informed by a mail/notification at 5 pm on june 30 when the time of delivery had already passed. They said they did not have any carnations and wanted to check if they can send a cake instead. But they did not wait for us to respond and cancelled the order. Since then we have been trying to contact them through email, phone call and by raising tickets on their website but we have had no luck. They are closing our tickets without any solution provided. Later they said they will refund the said amount of 658 ra in 5-10 days but we have not received the refund yet. Kindly look into it.