unsatisfactory service

A few weeks ago I received a call from a consultant at Smart mobile offering me a cell phone on contract, the latest samsungs to be exact and I told her that the monthly subscription will be too much for me and she advised that they have a new phone on the market which have similar features as a Samsung at a much more reasonable price called a Karbonn titanium. I agreed to take it and it was delivered a few days later. After opening the package and realising that it is a very weak phone I phoned them immediately to ask if I can swap for another phone as I was unhappy with the one I got I was told that I would have to pay half the price of the phone and return it. I opted to keep the phone and pay the settlement amount of which me and the agent made an arrangement for it to be paid. The very same dsy o decided to switch on the phone and use it and a few hours later it started to freeze and switch itself off. O reported the fault and was told someone would phone me back and even now im stilk waiting. I don't think its fair to pay for a phone that I will never be able to use. Another agent took me through the steps of resetting it, even now it is still dead. I just want a reliable fon