Bad service for return and replacement of incorrect product

I have been a loyal Takealot shopper but my recent purchase was worst experience ever. An incorrect patio set was delivered and I have been struggling for more than 10 days to get this resolved. I warned them I am going overseas but there were no haste in getting it resolved. I gave them my son's contact details while away but despite 2 messages that the incorrect patio set will be collected no contact was made with my son. Trying yo resolve this while overseas is an absolute disaster. Takealot gives you no access to management, no access to a complaints department and seem to blame the seller however I see Takealot as my service provider? How do I get this resolved?????? An expensive purchase with no respect frim Takealot.