Lenovo — I received a faulty laptop,it started facing issue with from first week of purchase

I have recently purchased lenovo Ideapad s340, and just in first few weeks of purchasing it, i started facing issue with my battery, it would shut down at 45% battery and would start charging from 0%, i filed a complaint and my battery was replaced, but still the issue was not solved. my laptop has more issues not just battery. The speaker is faulty too, the sound comingfrom the speaker is not clear and break's in between.I received a faulty piece while purchasing the laptop.i want a replacement or a full refund.