Customer Service at Rain is very poor

I have tried very hard to update my billing details and keep getting a message to say they will contact me or assist. Then no word from them. I have wasted numerous hours. I have messaged "Support" numerous times. The last message I got was as follows from Rabia Mahladisa Sithole:

Rabia Mahladisa Sithole (rain CeC)

12 Jul 2020, 09:59 SAST Hi Beverley,

Thank you for contacting rain customer support and sincere apologies for the delayed response.

If you are unable to make payments for your purchase. Please check if your bank card has 3D secure activated for online shopping, confirm with the bank on your online spending limit. Please also try using another browser and clear the history too. If this isn’t the case, please reply to this email so that I can give you a call to assist further.

To which I rep**** to the email that all was in order with the bank but could they call and assist me as promised. I expected them to follow through and call me to assist. To which they just sent another email with a copy and past line saying:

"It means that I will need to escalate to billing so that we can can further investigate".

They promised to call me to assist and still no one will call. I am still waiting to be assisted.