Hero Motocorp — Hero ignitor - repair

Address:

Pune, Maharashtra, 411004

Hello, I had given my bike hero igniter mh20cm0926 for repairing last month 5/04/2017 at savya Kothrud, Pune. They told me they will get parts after 10/04 but still they are saying parts not available.
Its Been a month and still the haven't completed there commitment.
Some time they don't pick phone, and sometime they say call on other number. What to do suggest ??