Shocking or rather no service

On the 20th of May 2020 I phoned the cancellation line to cancel my contract with immediate effect. On the 01 of June I realized that it was not done and my contract is still running. After that I have made 2 calls to Vodacom to find out why this was done and they said I will receive feedback from management within 24hr. I am still waiting for feedback after trying to contact them numerous times and I have emailed them with no luck. Is there still somebody working at Vodacom??I will not pay on the 01 July because the last installment was suppose to be on the 01 June 2020 and this was not done.