WORST service and No response from F1 Services, Ahmedabad branch.

I would like to congratulate F1 Services for being WORST service centre.

I own Asus Nexus 7 tablet and it has charging problem. So i went to F1 Services, Ahmedabad branch on 4th Sept., 2013. And today is 24th Sept., 2013. After 20 days i still could not meet or talk to the engineer. Whenever I call to F1 Services, I get the busy tone or the receptionist talks rudely. I also talked to Mr. Arun Sharma (+91 9873892277) of the F1 Services management on 21st Sept. 2013 5:15 PM regarding this issue. He told me to get back to me in 10 minuets. But I haven’t got any reply for him either.