Nokia India — Repairs of lumia 620

Address:

Kolkata, West Bengal, 700045

On april 9, 2016, i had got the volume and on/off buttoms repaired by infotel services, 1, ekdaliaroad, kolkata - 700019 who gave me one month warranty. As i am not a techi, i did not check if the repairs had been done. A week later< i got a phone call also from infortel asking if my phone was working. I answered in the positive but till then i had not used the volume buttons. About a week ago while trying to lower the volume, i found the button was not working.
Yesterday i visited nokia care run by infotel services.
On checking they told me the volume lowering button has come off and that i was to be blamed and that in spite of warranty, i have to pay.
According to them the part is soldered and that it cannot come of[censored]nless done purposely and even i had to point out that it is within warranty.
The way i was talked to, i had the feeling that it is a ploy to earn money...If a part is soldered into position how can it just come off. Ever since the repairs, i have been using the device very carefully, especially, because i am a senior citizen and cannot afford much expenditure and it is a gift from my son and have been using it for the last two years.
It is my earnest request that i should get redressel ...I feel the button was not fitted at all.
Also a request... You should give proper training to the personnel...They are there to help us..