Rain 5G - signal disconnects every now and then. it is difficult to live with this device.

I have taken Rain 5G to my home few days ago. when they checked on the system, confirmed that my area under 5G network in Sandton. But from Day1 I am struggling to connect. lots of Fluctuations. it gets connected for one moment and get disconnect next moment. Big Frustation. It is difficult living with it. I called Mr. Austin from cancellation department, he was adamant not to cancel my subscription and kept on asking for use it one more day. I dont understand why these people not supportive. I have to test the device one more day by going around my house wall by wall with the device if it works. I exercised almost all the time. But no luck. I request you guys kindly cancel my subscripiton with out any charges as your promise to give me uninturrupted network not fulfilled.