Contract promise not honoured

See my case tracking copied from my postgresql system below , promises made on contract not honoured and very difficult to cancel contract,luckily i database expert so could retrieve and answer questions quickly and get it right to cancel the contract.Two years ago i was caught out with same promise of extra 20gb that was not added, so i immediately recorded every little detail of this contract call and events thereafter

Refer phone call 13 October 2023 11h10 from +***0 lady said offer on *** to change from R227.00 per month to R229.00 per month(new router included) 20gb day and 20gb night plus bonus 10gb day contract effective 13 October 2023 for 24 mnths, said can cancel within 14 days after 13 October 2023 if want to at ***

on 25 October 2023 10h34 i sent message as per instruction from message on +***0 to enquire as to when the additional 10gb is going to reflect on my contract (https://rewardsco.com/contact-us/)

Having received no feedback from previous paragraph and not wanting to miss the 14 day cancellation period i phoned cancellations department at *** ref *** and after receiving confirmation that no additional 10gb on the contract i confirmed and asked for this contract to be cancelled and they confimed last day i can use internet is 31 October 2023.