Incorrect Billing Sanlam Discount not app****

I recently signed up for RSA Web for their home Fibre Package. I have unfortunately experienced multiple billing issues since joining. The 1st billing issue which eventually was resolved was that I was charged a delivery fee for a router I never purchased, and now the second issue I have is that billing on my account is incorrect.

When I joined, I signed up using my Sanlam Reality Discount and on my invoices that have been generated since I signed up, there is a specific mention of the Sanlam Reality Discount however the discount percentage is not being app**** at all. I raised this to the billing team and then they have told me that I need to go into app if I have a "Valid Sanlam Membership" and put the details in there, but there are 2 issues with this, I did it when I signed up and there is no place in the app for me to do this.

I would appreciate if RSAWEB resolves this immediately and applies my necessary discount as a credit on my account since I signed up (3 months) and going forward my invoices reflect the correct amount.