Prestige — regarding service

Hi,

I have purchased prestige marvel plus gas of 4 burner on 22th Mar 18. after installation( 24th Mar) this we checked, gas leakage and fire come from one nob/button. we raised the compliant on 24th to customer care of prestige. we also request its a emergency, please send someone technician. but till time nobody send or call from company.
I have 3/4 times called up to customer care, they people only say we will send as soon as possible. This company's service very worst and I am not satisfied it.
I request to you please take some action.
My last compliant no. MUMB3021471