Laptop Extended warranthy

Hey i bought a Dell laptop at Dion wired in 2018, i registered for an extra year warranty which make it 3 years. I have a problem with my charging block which is nog charging. As you are aware Dion wired has closed its doors so i am unable to get hold of them regarding the warranty.I have tried your call center and searched on google for your contact details without any luck since your landlines are also not working.Please assist how i can get hold off you, i am based in somerset west.