Shocking lack of care to the new owner of my car

I sold my car to them end last year and the sale went so quick that I did not have the spare key and boot cover with me. Since then I have followed up on Whatsapp with both the two employees in somerset west and I have also called the call center to make sure that the new owner gets the spare key and boot cover. These items cost R25000 in the shop and I do not just want to through it away. Today I spoke to Mtebo again in the call center and asked why I was still not called back as promised by them. She said she will send her supervisor an email. It is shocking to me that they would not care about their buyer and make sure he gets his very expensive belongings