i bought it 3 mouths ago
i want to ask apple if i can cancel it and
get maybe refund or gift card or something
how and where can i ask them that ?
because in refund page in not show
That's all you got. And I really don't think you're going to get a refund. It's been 3 months now. Why on Earth would they refund you now? You've had plenty of time to cancel, however you're now 25% of the way in.
If you don't get any help from the links then you could always try calling them or going into your local Apple store.