bad customers service

I bord a phone on the 24 December and it started giving me problems in May I took it back to the store. Moeti was assisting me and he told me that because its for the first time am bring the phone to them they won't change me cause the phone was having a problem with the speaker, they booked my phone for repair I never received any call from them. I was trying to get hold of them last week I was told that I must make a payment of R1200 an the phone its R1000 how do I pay the amount that is more than what I paid for a new phone when I told them that Moeti told me that they won't charge me anything I was told that his no longer working there its no my problem that I was given a wrong information I want my phone in good condition.