Order Cancellation

i successfully placed an order on Sunday 26th November 2017 and all the items i ordered were available.I paid for my order and i also sent the proof of payment to the Takealot consultant as well. Four days later someone decided to cancel the Hard drive on my order without notifying me.I would have bought that item from other stores but i trusted Takealot to provide a much better services than this one.How do you cancel an order without consulting with me first?How can such a an established store be unprofessional? This is unacceptable.