Refund not being paid.

I ordered a Rain router and monthly package for R499. Paid upfront. A few days later the router and sim were delivered. I could not get any wifi. On Saturday a technician came out, and it was discovered that there is no coverage at my rented house, unless I was to pay to put up an outside aerial. Cannot afford that, and it’s a rented home. The technician called his boss who agreed that he could take back the router and sim and I would be refunded. I was grateful, as I had not been able to use it, and never would be able to use it. Of course, since then I have received nothing, no calls, no refund!!! It’s disgusting. The only way to get anyone from Rain to contact you is to pretend you want to buy a product. Then the salesperson contacts you within minutes. And then I ask to be transferred to someone to deal with the issue. I then explain again, then am told again it’s being escalated and dealt with. I have had to do this every day since the router was returned. Every time you get another ref no, yet nothing is done. I’m hoping this might motivate Rain to do the right thing, but I very much doubt it.