Jaquar — flush button of toilet have a problem of same nature

Hello,

I have been using jaquar products for quite sometime now.
The problem that i have is with the flush tank button, in every couple of months there will be some or the problem with that system and because of that a lot of water is drained.
Although there after sales service is commendable but due to covid 19 even they wont be able provide the services
As i have 4 washroom and in a months span one or the other washroom have a problem of same nature.
Kindly post lockdown look into this matter and come up with some concrete solution.
Thank you in advance
Yours sincerely
Akhil keswani (Bhopal)