No response from customer care

Originally logged a call with customer care around the 27th of December for washing machine repair under warranty. Repair agent attended to the machine on the 30th and advised parts need to be replaced and would take upto 5 to 7 business days. It’s been almost 10 business days and no feedback has been given. Tried calling the 0860 number within advised hours, but it only rings once and then cuts off. Also sent a mail, but still awaiting a response. I urgently need feedback please