Unsatisfied customer service with Fundi

I am a client of Fundi. I recently bought laptop bundle and a power supply. When i tried using the three way plug of the power supply it was not working. I sent them email, and i was given a case no. Weeks past without any communication up until i went on Facebook and sent a message, informing them about the matter. They rep**** and a courier company was dispached to collect it. Since then no word from Fundi about the progress. I tried calling but its not connecting. I also sent them email but no response. I am frustrated as i am paying for this power supply and my son is studying for exams and i am struggling to help him as we all know this load shedding is affecting them greatly. Please help me