Deep Enterprises — 2 year AMC for washing machine

I was charged 10000 for a 2 year AMC of my fully automatic washing machine but those fraudsters just turned up once in last year and a half .
They had a female co-owner who receives the calls and threatens customers of indecent behaviour if we raise our voice against their unethical practce of looting customers under the banner of IFB.
After the first few months they changed their number and I am not sure how to contact them.