Mislead and ***********

I bought a laptop for a different price on the 3rd May 2020 then my order was canceled the following day when i checked the laptop price was R500 more they telling me its out of stock but when i bought it was in stock. 6 May 2020 i bought the same laptop again due to be delivered on the 13th may 2020 at 14:00 they tell me that the parcel is lost. No email received nothing. And on top the laptop price is R300 more added on the R500. No1 is communicating. My work has stopped since im self employed.