Medlife — refund for a order cancelled on 16th nov

Address:	560053
Website:	Medlife

I had a placed a order on medlife on 12th nov. It was supposed to be delivered by 14th nov but got delayed. On 16th nov, i decided to cancel the order. I had paid 730 but got refund of 240 only. When called up the customer care, they said refund will take 7 days. Still waiting for refund even after 10 days.
How come 240 was immediately transferred and rest takes time.
Also, bank transfer needs time, my case was a phonepe wallet payment. That should happen immediately.
This is completely unethical practice. I had written 35 times to medlife customer care through app serivce. Absolutely no response. Pathetic customer service and unethical business practice