CEO attempted to extort me for money he owed me

We booked 4 nights accommodation and scuba diving with Dive The Big 5. When we reached the second hotel that they booked for us our troubles began. The hotel booked us in front of a construction zone which was very noisy and dusty. Dive the Big 5 also added a R100 premium on the posted rates in the lobby which I feel is unethical without disclosure. Long story short, our dives were cancelled and had no further dives planned. We spoke to the hotel and they agreed that we should be refunded for the additional night stay which is no longer needed, but we would have to talk to Dive The Big 5. This was reiterated by Sam from Aqua Planet Dive Center in Shelly Beach. When I requested the R3990 for the night of accommodation and diving from Timothy Ray at Dive The Big 5, he refused. He did state that we are due a refund for all the diving which amounted to R2840, but no more. I disputed this fact as he is the one doing the bookings and our money was paid to him, that my arrangement is with him. We did not sign, nor were we served, any agreement or t’s & c’s. Mr. Ray then refused to refund any of my money, even the amount he agrees we are due, unless we put it in writing that we do not hold him liable for the accommodation. This is extortion as he is trying to leverage undisputed money owed to me to force me to comply to his terms. I consulted with my lawyer who contacted Mr. Ray, and he promptly refunded the money for the diving, but not the accommodation that even the hotel said we should receive.