Unprofessional cancellation service agent and unjustified penalty !

I just got off of an infuriating phone call with the Vodacom cancellations department. I have a promotional data contract for 24 months, where I pay R349 per month for a 400GB internet package (no device or hardware included). The contract is currently set to terminate in November of this year (2023). I requested a quote for early settlement of this contract and the customer service agent said it would cost R8 000 if I settle the contract early. The contract is only worth R3 141 (R349 x 9 months remaining) so this would mean they are charging me a penalty of nearly R5 000 !! (on a contract where there is no device being financed or anything to justify such a brutal penalty). I told the agent I am not happy with this fee and would like to dispute it - and after much back and forth she told me I was in breach of contract, laughed and said "goodluck trying to dispute this". What on earth could possible justify a R5k penalty when there is nothing being financed on this contract?? Absolutely appalled ! If someone from Vodacom reads this - my number is +***0 and my email is *** .