Dissatisfied customer of single sim device

I recently taken out a contract with mtn for a Huawei P30 Pro and received a non dual sim device and I am not satisfied as I was expecting a dual sim device.I was informed by mtn that the device come single sim from Huawei and they request it from them because of something to do with their network/broadband stuff, which I thinks is a load of bull****. I don't understand how Huawei can even sell or supply single sim devices as the flagship P30 pro is a dual sim device. I being a Samsung fan forever decided to change to Huawei P30 pro instead of Samsung note 10+ just because I wanted a dual sim device and to my surprise I end up with a single sim device which I have to pay for till my contract ends. That is anabsolute put off as I was thinking of being a future Huawei fan and supporter for all my future devices. Can someone please advise as to what I need to do cause its of no use me having a single sim device when I need a dual sim. I really hope Huawei can help me somehow to sort this out as I had no joy wid mtn.