Unacceptable response from Mr Price Home

I bought an electric blanket from Mr Price Home at Kolonnade, Pretoria in March 2022. We started using it in June 2022. In August one of the switches got faulty. I went to the store but they told me that they guarantee for three months only. I asked them to find our where I can buy a new switch but no response. I also sent an email to Mr Price Home ***. They confirmed receipt and promised to 'chat soon'. The next I received an email that the matter was solved, but no one even contacted me! I responded to Mr Price Home that the matter was not solved but no response from them! I will appreciate if the can let me know where to buy a new switch for the blanket.