Upgrade

Upon attempting to upgrade yesterday (24/06) I was told that I would have to phone head office and request for my credit limit to be increased for my upgrade to take place. I offered to pay cash but I was told that it would only reflect on the 7th of July on the system, which I feel is pathetic since when you pay cash, it is cash! Trying to get hold of the MTN head office ***) I waited literally 10 minutes before a lady answered the call, after requesting to increase my credit limit she transferred me, I selected the option to be sent through to a consultant dialling zero, only for my call to be cut. Attempting to phone again I waited 19 minutes and still got no answer. I will now be CANCELLING my contract with MTN and moving over to VODACOM as soon as I am able too.