[Resolved]  Byju's — return and return

I purchased a package of p. C. B. From byju's. Before purchasing product they promised if i don't satisfied with that they will refund my amount within 30 days of receiving product. So i purchased that and i received it. And i am not satisfied with that so i mentioned a complaint of return and refund. One of them from their center told me that their refund team call me within 24-48 hours after that you will dispatch the product. But even today i don't receive the call from their refund team. I made calls repeatedly. Please help me and give refund me as soon as possible.