Skulduggery in its worse form

I have had a contract with said company for a few years and am absolutely flabbergasted at what a con it all is. I have come to the end of my contract and have thus finished paying for the handset and as expecting my account fee to come down in the same manner( there is another "contract" available for the same amount airtime at R35.00/month) hen I however enquired about it, I as informed that there will be a CONTRACT FEE OF R150.00!!!! Say what? I ALREADY HAVE A CONTRACT. For me to pay R88.00 for R55.00 AIRTIME/MONTH, is tantamount to being ****d and told to enjoy it. I am not sure if Vodacom has enough clients, or if they preferably will lose some?