Flipkart — Order delayed and then cancelled

I have ordered hp pavillion gaming laptop on 28 jan and order will be delivered 30 jan. On 30 jan they said order will be delivered on 2 feb. On 2 feb at night they said that the seller has cancelled my order and give me so called 2000rs gift card if i will make fresh order of same product whose price they have increased by 4000rs. And money not refunded yet they are saying that when seller will get the product then i will get my money back and the date is some 11 feb. I can't understand my mistake and why are they making me suffer that much. Not even refunding my money so i can purchase from another medium. I am ordering laptop for my online classes and test and they have just ruined my studies. This is first time in my life i am purchasing a laptop and you can think about the excitement but they have ruined that part of my life and even this is the first laptop or pc in my house they have just ruined my excitement and studies as well.