Purchased bedroom suite

I bought 5 piece bedroom set that cost 36 000, I first paid 18000 on the 17 May 2023 and paid 18800 including 800 delivery on the 18 June 2023. On the 20th of November I received an email that I must expect a delivery during the month end of November, till to date they didn't deliver. When I try to call them their phone is no longer going through and they are not answering my emails.