Bad service, unable to get help with *****ulent transactions

on 28th of february this year i had realised money was taken out of my account and i found that there had been 31 transactions which i did not agree to, on my bank statement it showed the merchant name vodacom but i do not have any contract or subscriptions with vodacom as i have phoned them and they told me it was *****ulent.The dates of these transactions are ranging from 17 december 2022 till 10 february 2024. The first step i took was to phone the nedbank ***** department and report it as *****, when speaking to the nedbank employee they told me it was *****ulent, they then blocked my card and i was told to fill in a nedbank card dispute form. I filled in the form and emailed it to them on 1st march and they got back to me on 13 march stating in the email "kindly be advised that the transactions in question are out of the chargeback timeframe of 120 days and the cardholder(me) should contact the merchant to have the matter resolved and there is no further recourse so the case will be closed". i did not understand why the email said that if i was already told it was *****, another issue is they said it was outside of the 120 days timeframe but these transactions started on december 2022 and stopped when i blocked the card in february 2024 now if that is correct then i should atleast be given a chargeback on the last 120 days these transactions were made. I have tried to get further information from nedbank via email, and phone but cannot get a response, they have not explained the situation clearly to me so i know what steps need to be taken next and there is no explaination as to where the money for those transactions went and this is supposed to be a banks ***** department which investigates ***** so how can they not explain to a customer what is going on or provide a resolution. another issue is i dont understand why the card dispute department from nedbank can't contact customers as the number is not toll free and i have wasted a lot of airtime sitting on the phone without any answer. As a customer why is it when banks need or require something from you they quick to contact you but when you need assistance it is very hard to get any help especially when dealing with *****.