@Tia8972
The guest will recieve 50% and you will be paid 50%, as per the cancellation policy.
The cleaning fee (if any) and taxes (if any) are always refunded.
The guest has received a message from Airbnb about the cancellation and the amount of refund (which is performed by Airbnb, not by you).
Please note guests sometimes are offered the oportunity to pay for a reservation in 2 installments.
If this guest was on such a plan, she payed 50% at time of booking and can pay the other 50% later. After cancellation there is no refund (except cleaning fee) if only the first installment is payed, being allready the 50% charged according the strict cancellation policy.
The guest must contact Airbnb, not you