Acer Letdown

I bought an Acer Spin5 less than 3 months ago. It stopped charging so I took it in for repairs. First I took it to Incredible Connection where I bought the laptop they said 15 days but if I called Acer they would send someone out to me - that did not happen. I eventually took it in to Acer Midrand - I said I could not go without the laptop for long as my whole livelihood is tied to the laptop. I also informed them that I would be leaving for Cape Town this weekend and would need it before then. I eventually phoned them today to be told I could call on Monday for an update - I will be in Cape Town then!!!!! My biggest issue is how does a 3 month old - quality laptop need a new battery