New phone with incorrect sim cards

I purchased a phone contract, it comes with Huawei P8 lite plus 2 simcards. Upon receing the package, 2 simcards were include however they are nano sim cards. Why on earth would you give me sim cards when you know very well that the phone you provided takes micro simcards? I called Wednesday 23/03/2016 however all I do is hold for 8 minutes and the person drops the phone. Eventually I got through to the consultant who assisted with nothing but to tell me I need to go into the Telkom store to do the swim swop and pay for it or alternatively go into a cell C store, purchase their prepaid sim cards which allows me to fit the nano sim. My question remains...why would I want to go through that trouble when you could just send the correct goods. I don't want to be paying extra for these things. This is my forst experience with MONDO but i'm actually not impressed.