Urgent Contact ASAP

Good day... I got a call from mondo regarding a contract for telkom for Hisence Infinity E9 x2 last week Saturday, that is the worst phone I have ever had I have sent over 20 emails this week to different departments of mondo and telkom for the return of the phone I even said that I am will to pay abit extra for another phone a different one I have packed up that phone and put it back in the box to be returned I have been waiting for days for them to get back to me. I did tell them I needed a new phone asap due to my old one giving up on me. The Hisence Infinity E9 is Slow SLOW, HAS TERRIBLE PICTURES AND TERRIBLE Videos, just goes into things I don't tap on. I cannot use it I explained that I am 26 I'm still young I know what a phone is suppose to be like and that Hisence e9 is a no no I also explained that I can't even connect to a smart TV yet its suppose to be a smart phone. I really wish they can call me before 7 days are up because I need to return that phone!