Unable to cancel Cell contract!

I received a contract expiry notification from cell c stating it will continue on a month to month if not cancelled or upgraded. I have been trying to contact their customer care (084 143 option 2) from then to no avail. The most i stayed on hold was more than 35 minutes, not mentioning other numerous attempts i had to cut the call. When you select other options to take up a new contract or upgrade they pick up within 30 seconds but to cancel it's clear it goes nowhere...I even informed their representative to give me an email or inform if i have to go to a cell c store but she insisted on connecting me to the retentions department which appears to not exists/ never existed. After research I noticed this is the issue many of their customers have to deal with. Their contact us option on their website is only for sales purposes, which i used to no avail... Cell C really needs to sort out their Cancellations Department, if it is so easy to take up a contract with them, it should be hustle free to cancel it, instead of having their customers to feel like they are about to be bound on some ****.