MTN Misleading Clients

I upgraded my contact 31 Jan 2022 and wanted to continue with the 80GB data only contact that I had already been on. So I opted for the MY MTN 40... because on the add it showed that its 80GB that i can get. for the past 3 months you guys have given me 20GB day 20GB night but where is my other 40GB. why would you advise 80GB for R199 but only to give clients 40GB per month with 40GB once off for the 1st month. You guys are misleading clients, I want my 80GB per month for R199 as advertised.