Pureit / Hindustan Unilever — Filter not being replaced

Dear sir, I have installed PURE IT MARVELLA UV at my home five years ago.Recently I have places request to replace germkill kit which was placed properly with sms sent to me.But today I was messaged that as per my request, they have rescheduled technicians visit after five days which was never requested by me.My service request no is RFS/11144886.Just now on 28.07.22 at approx 6.50 pm I have placed my request for service asap on company helpline no and was told that may request for urgent action was placed and would be dealt with within 24 to 72 hours which is not good.Please try and provide service asap.