Customer refund theft by store/staff

Good day. My name is Akani - a sneaker factoy shopper, I shop for sneakers at this store regularly (dobsonville mall sneaker factory) and one day I ordered two pairs sneakers for a minimum Lay-by deposit of R300 on the 26th of March 2023, Outstanding balance R1799.90. when I got home and thought of my choice within a week of Lay-by I went back to store to request for a refund but I wasn't assisted according to company standards, instead, they have been stalling and concluding that I won't get my refund any time soon because of their system is always offline, I do not believe an established company can fail to restore systems within a day to continue normal business, blame it on "power failure" and accompanied by different invalid reasons, the cashier offered to call out the Manager to clarify or process refund at supervisory level but the store/manager keeps sending other staff members to pretend to be a manager to give me exuses, one even took my ref and number to call me but it's been 3 weeks - nothing. Well I do not know any extensive laws but I reserve the right of choice and to get my refund from any legitimate business like SF unless stated on document with terms and conditions of Lay-by that it can not refund from the day of purchase order, I was never told that I might not possibly get my refund, signs of theft by store with their staff because I haven't got my refund till to day (19 of May 2023) I don't know whether company hired inadequate staff to advise customers and assist or they just tricking for sales unfairly. The store staff or manager did not contact me, I hope the TFG customer service team will respond effectively within 2 days of posting this, 19 May 2023.