faulty laptop

I bought a laptop last week on line and it got delivered on Friday 17 January 2025. The moment i unplug the laptop from the charger it switches off due to low battery. I contact them on the 23 to inform them that i urgently need a new one as I'm writing exam on on Monday the 27 Jan 2025 nad they keep on telling me that they have escalated the matter and someone will call me but at this point no one has contacted me. Makro does not care about their clients but are more focused on their process. I'm so frustrated i don't even know what to do!!!!!!