Punjab National Bank [PNB] — refund is not reflecting in my pnb account

Address:

Chandigarh, Punjab

I purchased honor 7x from amazon on 04/09/2018 and canceled it aftrr one hour. It was purchased for 14999/-.Amazon has initiated the refund. But it does not reflect in my account about 7 days. They have given me refund reference no 286404 and told me about charge dispute but customer care and brancj of bank is there is no such thing. Pnb is offering no helpful service. There staff is very rude. And they are not giving their services properly. Please help me. I will be very thankful to u.