Blacklisted cell phone from Takealot and bad customer service

I purchased a Samsung phone from Takealot. I have purchased many things from Takealot for many years and don't have issues with TakeAlot, apart from a return or two.

Recently, the phone was blacklisted. Enquiring with the network, they provided me with a printout stating the device has been blacklisted. Either Takealot are selling grey phones or providing a platform for other companies to sell these phones without any verification (most likely)

I am now sitting with a year and few months old Samsung phone and it is useless.

I am worried that the laptop I purchased will also give problems soon.

My biggest concern though is their after sales customer service. I have now sent the same information Takealot requested to them four times. Plus there was a very lengthy telephone discussion. Each time you have to start the process with a new person. It is absolutely ridiculous.