Faber — Poor response for servicing request.

I have AMC no.63300 for chimney servicing.On 02/01/2016 i requested for servicing. But so far no has come. I am contacting Faber service centre on phone no.[protected] since 02/01/2016 but till date no technician has come for servicing. Now they do even pick up the phone . I have tried 4to5 times today.l had sent complaints to [protected]@faberspa.com but there has been positive response.pl. do needful.