Unreliable Returns Despite 24 Month Warranty

I purchased a TP Link mesh system from this merchant via Takealot last year. It worked for the first few months, then stopped. TP Link took over 3 months to try and resolve it, none of which worked, and eventually said they were happy for me to proceed with a return. I returned the product, and it took over a month to get any response. Now, the return has been cancelled with no explanation, leaving me R3,599 out of pocket and needing to replace the faulty product - and I don't get the faulty one back. I'm shocked by the lack of communication and the consistent unprofessionalism from Takealot, TP Link and Baobab IT.