Terrible customer service at Garden Court Umhlanga

I'm a regular TsogoSun customer but experienced the worst service when I booked with TsogoSun Garden Court Umhlanga. I made 2 bookings for the December period for hotels in Cape Town and Durban however due to a system error, the incorrect date was captured for a stay at GC Umhlanga. I immediately notified TsogoSun of the error and asked them to amend booking to appropriate dates which they didn’t. I followed up with them after I hadn't received a confirmation email, but the opportunistic GC Umhlanga representative informed me that since the booking was made during their Sunbreaks discounted period, I would have to pay extra for the room for the proposed dates. I found this absurd as those dates where at the discounted rate when I asked for my booking to be amended. A representative from the group was meant to contact me when I enquired about a refund but that never happened. Subsequent to the bad service received from GC Umhlanga, I chose to stay at Tsogo Elangeni instead. I've since made several enquiries to TsogoSun regarding my refund and to date they haven't bothered to action this. I'm utterly disappointed in how Tsogo treats its customers, especially after years of continued loyalty from my side. Rest assured I will not be booking with Tsogo ever again until this matter is resolved and will be sure to inform others of this bad experience.