Vodacom refusing to terminate expired contract

I attempted on numerous occassions in March and April 2020 to ensure that my contract on a data only line, which was not being used with vodacom was terminated upon its expiry (30 May 2020). I visited a Vodacom Shop in Gateway and was told that I had top phone their Customer Care line. After taking my message and all my details (because they did not seem to have them on record !!)they put me through to "retentions" where I was cut off ! They then continued to run the account and bill me in spite of the above.Covid restrictions prevented me from going to Gateway and taking further issue. I have agreed to make payment of the amount outstanding until the end of May 2020 which I am contractually obliged to do. Vodacom are flagrantly refusing to indicate the amount outstanding until 30 May 2020. They have been opportunistic during Covid and deliberately frustrated account closure.

They even claimed that they could not contact me on the subject line 067…. - which is a data only line !!

In spite of my cancellation and termination of service requests, Vodacom are still sending me an invoice. In 2017 it took me 8 visits to their midrand branch to remove my voice message from an old expired and cancelled contract on ***. They are abysmal service providers.