CRANE'S NEST SPA BROOKLYN - CHANGED TREATMENTS AFTER PAYMENT

I've booked a special on 4 October 2019 through Crane's Nest Spa in Brooklyn from a quotation with spa treatments included. Once I've paid my 50% deposit I received a statement indicating less treatments and time. I queried it as I've paid for what I was quoted on, but they stuck to their side of the story saying the person who initially quoted me made a mistake. I said then they should rectify it on their side, either they give me the treatments I booked for, or they should refund me. I was promised a refund since about 9 October. I follow up with them on a regular basis but with no avail. My deposit has to date not be refunded. I informed them various times that if they don't deliver I will take this matter public. Now they just ignore my emails and whatsapps. My thinking now is, if they want me to take this comment down, they can refund me my deposit with interest, or I will also take the matter to the Consumer Goods and Services Ombud.