HTC — Both sim card holders faulty for 816g

Address:

Hyderabad, Andhra Pradesh

Sir,

I had purchased htc 816g in nov 2014, after few months one of the sim card holder did not work properly and i moved the sim to another one and just after few months other one also stopped holding sim. I took it to service centre (Tvs electronics ameerpet, hyderababd), they asked rs 9500 for motherboard replacement as repair was not guaranteed. Can you please help explain why the sim holder can not be repaired in service centre or is it strategy to discourage customer by quoting very high service charge. I am highly disappointed by the quality of 816g and htc should improve it product quality and provide better services to its customer. Thanks