Expired contract and poor service

Hi vodacom I have been fighting with this company since December over a data contract that has come to the end of it 24 months once this contracted had ended the device had no longer worked or inactive so I assumed they ended the service at end of Jan I received a debited order of just over r700 when approach the Glen branch they suggested I reverse the debit order as no one could give me info on the debit order as I open a new contract so they thought possibly ***** . End of Feb I received another debit order of R1611.00 again I was told to reverse it once I had reversed it I got a call from your pathetic agents that asked why I didn't cancel the contract first off I did not get any recordable notification as per the CPA act 80- 40 days prior to the expiring date of this contract to be notified if I would like to cancel,upgrade or go month to month I then was told it automatically gone month to month and I should pay ,first off the device does not work so how do I access the service I am paying for and the contract was at the value of R210.00 per a month so in two months how they get the total of R1611.00 amazed me and they can't give me an answer and the one agent still had the check to tell me it is my own stupidity as I should of gone to vodacom for a sim swap to see as why the service no longer work, well done on your customer service there ,they also can't provide me with a statement for the above amount. I regret just opening a new contract with vodacom as I have the same **** service the bundles don't work I was promised a refund which never came to light will never deal with vodacom again!!