Terrible Network Connection

I have my rain sim from 08/04/2019 until date but since march 2020 I've been having problem with the network connection and have called Rain Customer Service several times to try and resolve this problem - I logged a case with an agent at the helpdesk on the 17/11/2020 without any communication that case was closed and today 17/12/2020 I have logged another case with Jabulile @10:32 - Ref ***. I am paying for unlimited 4G 24/7 but get 0.00KB/s and 0.34KB/s with both upload and download - Awaiting your urgent response