Don't be de*****ed by 'cheap' prices on Takealot

I ordered and paid for certain items on Takealot. A day before expected delivery I am emailed by takealot - to say that they have cancelled my items due to an error in pricing on their side. I find such practise unacceptable. It seems ********** to lure consumers into ordering various items and then unilaterally cancelling those that suite takelot to do so. Beware of 'cheap' prices on takealot as it is nothing but a *****. Is it even legal for one party to unilaterally cancel a contract of sale once the transaction is already complete and paid for?