Review Your guarantee policy with your supplier does not work

I ordered an HP Elite laptop which had a faulty camera & the laptop was returned to your warehouse.
After over a week Takealot finally agreed that the laptop was faulty & gave a credit.
I do not want the credit, as I phoned HP and they authorized a full exchange as the laptop was under guarantee. It was almost brand new.
I have asked Takealot to PLEASE go and Exchange the laptop at HP and get a replacement under the guarantee.
I am still awaiting 2 days later for a response which has been escalated to management on 2 March.
For goodness sake how long does it take to get approval for the replacement from HP, which they themselves are prepared to honour?
I included the HP Replacement authority on my return packaging, which just seems to be ignored.
Shocking service when I urgently need the laptop not any refund!