Damage deposit not refunded

Hired a vehicle from Tempest on 13 Jan 2015 and returned on 15 Jan 2015. A damages deposit was put through on my credit card and not refunded when the car was returned. I have spoken to 3 employees of Tempest and all they say is that the refund was processed on 16 Jan but did not go through. I still do not have the money back in my account and there seems to be zero urgency to resolve this matter. A consultant I spoke to this morning assured me she'd get back to me by the end of the day. I have heard nothing from her. I called Tempest again and was told managers work from 8 to 4 I must call back tomorrow. It's strange how there were no issues taking money from my account yet I have to chase Tempest to return it. Do yourself a favour and stick to well known customer centric brands like Avis!