Unreliable online prices, with no callback

I viewed a product online (Product ID: 306814EA) the price was for R2000, I added it to my my basket, went to checkout and the price changed when I tried to checkout, I removed it, went back and added it again hoping it would work this time, it didnt. When I tried adding it for a third time the price changed on the page where I wanted to add it. I did the same with a different product that still said R2000, and took a screen shot of the pricing, but when it was added to my basket the price once again changed on checkout. I contacted your call center, with good help from a mister Calvin Smith he sent me a response from someone higher up that stated, sorry the pricing on the site was a glitch which means ill have to pay the higher price. I automatically responded that I wanted it for the price advertised to which Calvin responded by asking for my phone number that he would send to them and ask them to contact me, its been 28 hours now and no one has contacted me.