Order for oppo reno 8 cancelled arbitrarily

Hlo sir/mam i am sweta a college student. I have ordered a phone oppo reno 8 on 7 aug2022  and the promised date of delivery was 10 aug bt they extended to 15 aug. And now even they cancelled without telling me first as I had my old phone to be exchange so i wasn’t able to go another place as order can’t be received by others I had to be stucked here waiting for there delivery. but , they just cancelled I am really disappointed I want a compontation ahead.
Please take some action I request you it will be a kind act from you.