I need my refund

I placed an order via Facebook and called to confirm for my son's birthday party that was suppose to be in August. Sent the proof of payment few later but i had to cancel the party and i advised her of the cancellation on time and asked for a refund and she said she doesn't have an issue in refunding me the money, Provided her with banking details to transfer the money and that was in July. Up until today i haven't received any funds.I keep on sending her inbox on Facebook but she just reads and never replies.