Never take a contract with vodacom

I had a contract with vodacom which came to an end in September 2020 i called vodacom in july 2020 again in August where i spoke to Kyle advising vodacom to that i wish to cancel my contact at the end. I called vodacom 5 times asking them to cancel my contact however to my suprise my contract was never cancelled and im told that im in a arrears while i made payments until October 2020. To make matters worse i was told that my matter was escalated and it will be cancelled as requested. Vodacom hung up a call on me today 03 February 2021. They also told me that they nolonger have records of my contract and i have to deal with collections. Collections refuse to assist me because they want a reference from account cancellation. Somehow they say i owe R600 while my contract terminated and i even lost the sin card ages ago.