Bad service

I took my Samsung note mobile phone for repairs after it would not turn on, I went to Mtn Westgate mall since the phone was originally bought there and was still under warranty. The consultant attempted to "fix" the phone and after failing decided to book it in for repairs at Samsung, that was on the 7th of October. A week later I tried to call the store a number of times without any luck. Two weeks later I go to the store and instead of being assisted the consultant gives me attitude and tells me why I'm coming to the store and not going to Samsung. After causing a scene I am then given contact Samsung contact details and after calling Samsung with my phone's imei they tell me that the phone has been ready since the 14th of October and is awaiting collection by Mtn. I am then told I need to wait for a further 7 days. A phone booked in on the 7th, fixed on the 14th only ready by the 28th. Had I not followed up then nothing would have been done, only God knows why I'm still with Mtn.