Cancelation of Data contract with Vodacom

I contacted Vodacom 13 March to cancel my data contract it was never done, 7 April I followed up an spoke to Vaneshree, I told her I want to cancel my contract unfortunately she did not cancel my contract but upgraded my other data contract she told me I'm entitled to a free router I told her I do not want one she was persistent it's for free, 1 May I received an email confirming my upgrade I contacted Vodacom again spoke to Poloso and advise I did not gave consent for the upgrade he arranged fir the collection of the router. 15 May I followed up again insisting they must listen to the recording with Vaneshree I was given a reference number and told someone will contact me within 72 hours- no feedback, I followed up again got a new reference number and was told someone will contact me within 72 hours, how many calls, reference numbers an follow ups are enough?? They are quick to say please note our calls are recorded when you actually insist on the recording nobody can assist