Dell India — Dell service centre

Address:

Kamrup Metropolitan, Assam, 781003

I had a very bad experience at the dell service centre in guwahati (m/s delight solutions) when i visited to get my dell inspiron 13 7349 repaired. there was some problem with one of my usb ports due to which the port was not detecting any device. the person in charge, after examining my laptop, told me that i should get my motherboard replaced, and that it would take 4-5 days to get it done. since i had some important work, i did not submit my laptop.
I had doubt on this solution given to me so i visited another computer service centre which is quite well-known in our city for their reliable services. the person checked my laptop and told that there was some local problem in the port and he repaired it in half an hour.
I really want to put forward this issue because if the problem could have been solved in just a short span of time, then why was it asked to me by dell service centre to get the laptop motherboard changed. my laptop was in warranty period and i neednt pay for the new hardware but it is a big harrassment to get things done when not required at all.
Please look into the matter as i sense malpractice in this particular dell service centre.