Vodacom contracts Cancelled

My 2 Vodacom Contracts expired Oct 2020. I have cancelled the contracts in Jan 2021. Vodacom then upgrade the 2 contracts with a new contract than I did not agree to in March. I have phoned and cancelled this in March.Phoning Vodacom every week in March, April and May. On the 10 of May vodacom promised this 2 contracts is cancelled end of May. Got ref number etc. 1 June 2021 still not cancelled.... what more do i need to do to get this cancelled?