Constantly replacing a phone

I took out a vodacom contract with Vodacom early last year with the Huawei P6 smartphone.<br> A few months later it was giving a lot of trouble,so I sent it in and Vodacom replaced it with a refurbished phone (that's what they told me). This new phone lasted about 2 months and started giving problems as well, so I took it back and they gave me a new Huawei P6.This one AGAIN gave me issues, and it was replaced again with the same model. <br> <br> I took it back Again and asked if I could have another brand or phone (anything really) and they said they cant do that, my contract says I must have a P6 so its what I will always get. This phone is *******, after a few months the apps stop working (I only use facebook, whatsapp, instagram, and snapseed, I play no games on it, the camera is too bad to even use), it often tells me the sim card isnt in,and I need to reset it, a few apps dont work properly, the maps sometimes freezers while I'm using it .<br> <br> Why do you guys keep replacing it when it just breaks again a few months down the road and you give me a new one?? Please can I just get a different phone. This one is packing up and I really hate having to wait 2 weeks for a replacement that will fail