NO delivery and NO refund.

I purchased a tumble dryer on the 8th of October on the online store, paid in full. On the 20TH of October my order is cancelled with no reason and I was promised a refund, I have called every day, sent bank detail, sent bank statements and still no refund 15 days later. All I get is a sorry for the inconvenience, we will escalate. I have been extremely patient just for an agent to try lie to me and tell me my refund was done and then say it will only be done this Friday and then will take 5-7 business days, why was this not done 2 weeks ago? if payments are done every Friday why wasn't it done on the 24th of October and 31st of October? Absolutely disgusting service from a "Leading" brand. Why will no one give me an answer? Why will no management ever call me back? Why are the agents lying to customers? DO NOT BUY FROM SAMSUNG ONLINE. they are a bunch of lairs and will not give a refund in the promised time