Bad service!!!

I called DSTV in the 8th asking if I could downgrade from paying R429 to paying R120 and the gent I spoke to said she has downgraded my package and I should pay R129 then start paying R120 on the 01 September 2022 which is my subscription date. I paid it and I was reconnected then boom on the 23rd of August 2022 I am disconnected and told to pay R179. I do not understand why the agent I spoke to didn't tell me anything about the 23rd of August 2022, why did she lie to me and said I will pay on my subscription date which is the 1st of September 2022. Why am I punished for something that is not my fault I mean the calls are recorded there you can search for the call and her that your agent did not mention anything about the 23rd of August to me.