Terrible customer service

I ordered a fridge, on the 20th of November, I received it on the 12th of January. I literally had the fridge for 7 days and they asked me to pay my next subscription, I asked them if this is fair and the response I got was this: " (11:34:33) Siphe Nleya: Hi Khulekani

Thank you for bringing this to our attention.

Your query has been transferred to a department that has access to assist.

We kindly ask for your patience as they look into this and reply.

Kind Regards, Team Rentoza....

Next thing I know the tocked is closed and it's been over a week without any communication regarding this issue