Samsung refuses to honour Fold 4 warranty

I purchased a Fold 4 from Takealot as it launched in the country. After around 3 months the phone no longer unfolds flat. I took it to East Rand Samsung to get it fixed together with the invoice from Takealot. They refused to look at the phone as the invoice didn't have the phone serial number on it. Takealot refuses to give me an invoice with the information and also wont honour the warranty as they also want the accessories which they have now lost. So I have a very expensive paperweight that two supposedly reputable companies are refusing to fix.