Impossible to cancel contract

I have phoned Vodacom cancellations line 3 times. The menu is simple and efficient and each time someone has answered my call within a couple of minutes. Sadly this is where the service stops. I am leaving SA and therefore just need a final balance to terminate my contract yet it seems after 3 calls and promises this will be done it is just too difficult. This has taken around 10 days because apparently my number is on the old system that has to go to a service request which can take 48 hours. Guess what nothing happens and I have to phone again. It appears deliberate to delay my cancellation and every time the Helpdesk user promises I will be sent the mail and each time it doesn’t happen. I done want to name names here I just want to terminate my contract. Is that so difficult?