Refusing to pay the refund

The service bad, they don't have a refund policy on their website and ads, they just make up rules as they go. I wanted a refund for a booking I made and had to cancel a week before asked for a refund and they refused just like that. Asked for a refund policy or where I can find it on their website or ad they couldn't provide one. They agreed to give me 50% back last week, I mailed my bank details as requested when I asked when I will receive the payment they told me by the end of business today. Guess what today when I texted and emailed them about the refund they just blue ticked me as usual.

They are unprofessional and don't have any policies in place, they just make rules as they go and don't care about us especially if you're not bringing them money.