Unhappy client with cellular repair

Good day I bought the phone a year ago and took the phone in to get repairs about a month ago.The phone had a crack on the screen that happened To days after I received the phone.The phone was not taken in for the screen it was taken it because it would not go on and it gave an error message on the tip right corner about software.I received a call that the phone would cost 2400 to fix when the value of the phone is 2999.A guy phoned me by the name of Alex that was very rude and aggregant and dropped the phone in my ear twice.I recieved sms that the phone has been delivered back to the store but the phone is still not fixed.The southgate branch manger phoned me to say that I must come and collect my unfixed phone.Why must I pay when the phone was under warranty and when it was only a software issue this is a not right and Foshini and Samsung has not been willing to assist and has no customers service at all.Please help .