My Flower Gift — Cake delivery

I had ordered a half kg mango delight cake for a birthday celebration.
After hours of following up, they said they have only 2 flavors- black forest or white forest 1kg and asked me to pay the extra.
I told them to cancel the order and arrange refund as I didnt like the flavors.
Till now no proper response or refund. Its been more than a week.
Worst service.