Worst service and shocking complaint resolution, no collection or refund after cancelation

Ordered rain 5g on 24 Feb 2022, delivery was made on 28 Feb 2022 around 11h00, simcard activation sms received around 15h00 but I was never able to connect to internet, called and emailed rain from 28 Feb every day. They never give you actual solutions or reasons for the issues I experienced. It's always will log it with a different department and they will call you which they never do. By 03/03/2022 I gave up on the network and requested cancelation of the sim and contract via email and contact centre. Again on 04/03/2022 and then received and email to deliver a new simcard. Received a call from he courier ho arrange delivery, turned them back called call centre to cancel yet again. Saturday 5th I called again to follow on cancelation since no phone call has been received to arrange collection of the 5g router, again the call centre was surprised no collection was arranged and it was escalated, I got a call after that but it was knly to confirm that I will receive a call to confirm cancelation and collection. Nothing has happened since, it's Wednesday 09 March and still are in possession of the device and have received no refund.