Evetech purchase so upsetting

I bought a fully custom PC from Evetech worth R38,124 on Tuesday the 26/05/2020. I was emailed on Tuesday the 02/05/2020 stating that the motherboard I want with this build is out of stock (4 working days later even though their email after payment stated that the build take 10 to 12 days). When I checked on their website when purchasing the build everything was in stock. They gave me 3 options. 2 of those options was not a good enough board and 1 was to expensive (an extra R4200). I explained to them that I cannot spend so much money more on this build can they not give me a better board than the 2 options first given or I will compromise few accessories in the build and pay the difference. I haven't got a response yet. I then got worried about the stock availability and decided to apologize for going around the bush even though I never recieve a response yet and paid extra for the R4200 motherboard because I was afraid of stock issue. I also told them if there is any other part they don't have for this pc build I want a full refund which would be R38124 + R4200 + shipping insurance. I haven't got a response yet. I understand they are swamped. At least send a courtesy email to make me aware of everything. I honestly don't know what to do. I just want to be notified of what's going on.