Incorrect and unsubstantiated Data Billing (Billing Dispute)

I have a contract for a data bundle(40Gb day+40Gb night)(paying R209) with Telkom (Stanger - KZN) for more than 5 years and in September they had a special of 80Gb day & 80 Gb night for R199 of which I decided to sign up for ( Just Data Only). The problem started right after that upgrade when they charged me (R105)for Event Billing Usage of which I do not know anything about it and I have complained about it, asked the shop and call center people to reverse it but that has not happened. Instead they have continued to charge R177 for this Event Billing Usage including for messages R0.50 on 01 Nov 2023 statement. I believe they are not generating sufficient revenue that they decide to make unsubstantiated and invalid charges. When I was at the shop the assistant deactivated some options and told me there is nothing she can do about that R105 I need to call the call center and call center people told me they will escalated the query . I guess escalating the query meant charging me for this item again and when I was upgrading the assistant used printed paper as he indicated that they were offline.