Terrible service trying to upgrade

I have been trying to manage my upgrade with Mondo for the past 3 months. I have phoned numerous times, with their MTN side being offline almost every time. The phone I wanted was out of stock (not to their fault), but finally after switching my phone to another which I specifically asked that must be in stock, I was advised again via sms that the phone I want is out of stock. Again phoning - MTN being offline almost every day. The dealing with them has been frustrating and unfruitful. The online 'track our application' function also does not work. I will never again upgrade online - or via phonecalls received - as they say they are from MTN, but are actually phoning from Mondo to manage your MTN upgrade. I would rather go with MTN directly from this point forward.