Fireroom Sushi and Grill not paying me my deposit back!

I recently booked The Fireroom Sushi and Grill restaurant for my 40th Birthday and was looking at hosting 50 people in their restaurant. We discussed various menu options wtc. All went great and they treated us with a tasting of somw of the starter options. I was quite impressed ans the food was fantastic.

I was told to pay a deposit which at the time was R10000 which we did immediately. A week and a half before my party is to take place I had to unfortunately cancel the whole thing. I contacted their manager via whatsapp and explained it and he said they would gladly refund me my deposit.

It has almost been a week since I notified them on my cancellation and up to date NO REFUND has been paid back to me. I have been kind at patient but I am runningnout of patience now. I am at the point of losing my cool! I cannot understand why a refund should take a week to process. It's a restaurant not a multi million rand industry for goodness sake. I was going to have dinner there even after all was cancelled because I love their food but their ethics are in question now! I just want my deposit paid back in full as promised!