Contract termination

Hi I have two contracts with Mtn the 1st I pay R99 and I get 2 gigs a month the second one is for 20 gigs for R499.I got a settlement amount for the 20 Gigabyte contract and I paid the amount.I waited for the 48 hours and called the call center to terminate the contract as I was instructed to .Spoke with Portia who assisted me and advised me that the contract was cancelled.I asked for the termination letter only to be told that they do not give those out and I will get a sms which sounds strange considering the fact that I work for a bank and in normal procedure to give a termination letter ones the agreement has been teiminated.But the true shock came later when I learnt that she actually cancelled both my contracts not just the one I requested .So inclusion the level of incompetence at Mtn is astonishing and considering that fact that I work in customer service you get fired for doing things like this or is it just business as usual at the Boza network.