No delivery 11 days after sms delivery notification

I am very disappointed with the service. I ordered and paid in full the much advertised bedding on 19 Jan 2018. I had to make 3 follow up calls to their call centre as i kept receiving sms that Homechoice was waiting for my payment. After sending proof of payment countless times to them i then only got a confirmation sms that my delivery would be delivered within 24 hours on 31 January (this was 12 days after payment). Up to now i am still waiting for the package to be delivered (11 days after notification of delivery ) Has this ever happened to anyone? How can i escalate the issue further?