Girias India Investment — Washing machine related

I have purchased Whirlpool washing machine on girias tirunelveli on the year 2021.. but now the washing machine has some problem.. I want to register to complaint on Whirlpool service .. they ask bill.. but the bill was missed .. afterthat i asked girias tirunelveli to get my bill duplicate copy .. they told there is no way to take a copy...he says After 14 days the bill details erased automatically from system.. is this possible .. I think girias always fooled their customers..if it's erased automatically how can they filled gst