What a horrible experience and service

Need some serious advise please... Im temporarily disabled and mobilizing in a wheelchair!!! So yesterday I went to Newtown Junction at Cash Crusaders looking to purchase a Bluetooth/Wireless Speaker and what a horrible service I got. The price on the speaker was R389.00 and the sales consultant sow the price but I then ask again what was the real price? And she confirmed the price but another consultant came over and removed the price and replaced it with a price set of R489.00 as I was about to purchase, I reported the matter to the manager but he told me that its not his problem and he wont sell me his service... Thats the manager and he wasnt to sure about the price either but continually told me that Im cursing when I told him that I feel ****ty because of the service Im getting and he couldnt even talk to his stuff members or do anything about the matter. 1 May 2019 at 1p.m