Rain Disappointed me. 5G

Last month I called rain to upgrade from 4G to 5G, they contracted CDC to deliver the device. Instead of 1 they came with 2 devices I told them we only need 1 and the CDC lady cancelled the 2nd paperwork and I explained to her that we only need 1 device, she went sack with the device. Few days after I rcvd a call from CDC confirming the cancellation, and a week after they called again I told them I cancelled one and only need one device. Few days after Rain called about 3 times and I explained the same to them, they said the problem will be sorted 3rd time they told me the problem was sorted only to receive a returned debit order from my bank for R998 they are billing me for 2 devices and I have to pay the bank fees for that unpaid debit order. I'm so disappointed with Rain I have been trying to call them for days I can't go through their support I only go through when I take a sales option then they play music and never pick my calls. Rain only entertain you when you are buying , the 5G internet doesn't even work properly is as bad as the 4G