Refund due to goods not being delivered

I ordered clothing online and made a purchase on 04 April 2020. I was aware that I will receive the delivery after lockdown but up until today I have not receive. an agent called me on 08 May 2020 regarding one of the goods that could not be delivered because it does not form part of level 4 essential goods which I requested for it to be cancelled. I asked when I would receive the order since on the confirmation of the order I was told that delivery will take place between 9 and 11 May and she assured I will receive same by the 13th May 2020 I tried calling their lines after the 13th passed and the line has been disconnected, I sent 3 emails first one which was to follow up and the other two to cancel the order and requested a refund but they are ignoring the emails. I want my money back because I purchased the good somewhere else and want to replace the money. Their service is a nightmare and I am more fustrated that they are not reachable on either emails of the telephone line