Duck and diving left with a white elephant

I bought a laptop from MTN direct last year march and the laptop was very slow and in January my sister asked me to check the warranty and it's still under warranty last year when it was slow until this year I didn't know that I was supposed to call Lenovo and In January I goggled Lenovo South Africa and I called and I narrated my story and Cynthia referred me to part serve in Sandton I then took my laptop there and three weeks later I called to check on the progress of the repairs and I was told they were waiting for the hard drive and on the 6 February I was called to collect my laptop and it was still very slow and all my files were not there and the backlight was also not on part serve said I need to buy SSD for R18800 and I said that the laptop was still under warranty theyy said I should call the manafacturer and I called Lenovo South Africa and I spoke to Jan and he said he was going to contact part serve and get what they did initially he had said that the laptop could be replaced ad it was still under warranty but yesterday he changed his tune and said he was going to lose his Jo and he promised to call me after speaking to part serve and he didn't call each time i call I am not he is ni available and I have a white elephant