Intimeservice — bill not given and excess billing

Address: 560001

I had requested the company to repair hotstar geyser... The person came and repaired coil and charged 3650/-. Which appears to be excess billing... I asked for bill he told it will be sent by mail... So far bill not received... When i called up hus number (Shivakumar) he not lifting phone... I enquired and realised that the coil charges are only max 1000/-.. Appears to be fraud company